Fixed it ! .....the earlier clavinovas actually have 4 graphite strips pre key and after cleaning and repainting them 6 times ( made my contact paint with water based polyurethane and graffiti powder ) with no results on the last try before putting it on the lawn , Out of the corner of my eye a tiny glimmer of copper speck flashed on the trace between the next 4 strips , the green material that seals the copper trace had worn off so small you really couldn't see it.... but it was enough to make contact when the the key was pressed.... paint brush and poly urethane over the worn spot..... good as new....there is no way of replacing these board yamaha stopped selling them so bringing them back to life is the only way... thank you for your help , i hope this will help other people keep these alive....
You saved me with this! Haven't played a C key for year because of this issue. But after using the pencil, I needed to clean the with alcohol a bit, to remove the dust. It's working again!
Thanks for the video. I have a Korg X3 and followed your suggestions with 2 key differences 1) did everything with the power off and 2) cleaned the dirt off rubber surfaces with some IPA solution. No graphite pencil needed in my case. Thanks again.
Thanks, great video!!! A simple thing to try first before disassembly is canned compression air blast with the tiny straw attached. I just tried it on one of my digi's for 3 dead keys and it worked fine. The lil straw will fit in between the keys and possibly get some air under the rubber contacts (gently ! Don't ever push if you feel any pressure at all lol. IOW, don't try to work the straw under the rubber contacts. Just work in between keys again gentle.) Blast the air for a short blast around the offending key. Don't over do it. Sometimes just a short lil blast is all you need. Reason ? The amount of pressure of air you get out of the end of that nozzle is quite high and might be enough to clear a few microscopic specs of dust.
it's 100% worked for my korg krome. million thanks! i just cleaned the contact with dry cotton bud and use the 6B pencil to draw on the contact as shown in this video. I was doing it with the power on so i can check if it works. since most of my keys were not working well so i decided to draw on every contact. If the graphite are too much there will be short circuit with frequent repetitive sound of that key produced (rather than burning the electric board) which can be solved by using an eraser to remove the graphite and redraw the contact properly. I believe i dun need to change the rubber strip unless the underneath rubber dot were worn out.
The problem with using a pencil to fix contact problems is after repeated hits, the graphite will smear and short out the contacts. Just clean the contacts with isopropal alcohol, and use a proper conductive liquid repair pen.
Not certain about the points made but ,if anyone else is searching for computer repairing try Saankramer Electronic Magazine System (Have a quick look on google cant remember the place now ) ? Ive heard some awesome things about it and my colleague got amazing success with it.
Cheers man, appreciation coming in all the way from Uttarakhand, India. This helped me bring my M-audio Key Rig 49 back to life, Keep shining, Peace out, keep on bringing such great stuff.
To anyone watching this video: this is at best a temporary repair, as the lead from the pencil will wear off. What he should have done is clean the bad contact first with contact cleaner, then use conductive paint specifically for electronics and paint the contact areas again for a more long-term solution.
@@norakatwhy? if its pure alcohol being used to clean, it'll evaporate right off after, so there' shouldn't be any left to make contact with the rubber.
@@norakatactually you use it on CONTACTS and contact surfaces, it evaporates quickly, and NOT on the contact supporting rubber strip. Have to spray it on a piece of paper towel and precisely use it to clean only exactly where you need it
I didn't have 'le Pen' so I found a soft lead contractors' pencil and now the long dead A#/Bb is sounding again. Works for me, I have a KORG SP-200. All these things, no mater what make, are a mystery looking at how to open/close the darn things, but they all have big chassis screws holding the key-bed down, and smaller screws that hold the end caps and cover plates in place. Not a lot on yt that clearly shows disassembly, so I dived in and did a Fatar STUDIO 90 which is super simple to open, and the harness is easy to unplug. On my SP-200, the harness connect's were impossible to understand how they release, so I just carefully moved the contact's board around with the harnesses connected (that was a lot of screws, huh??). The board looked clean so I just lightly rubbed the 4 contacts to the dead key, stuck my tongue out, protruding a little, maybe a quarter-inch past the lips, and scribed over the conducive surfaces a little, plugged 'er in and the whole upper board was dead, now..realized I had to compress it to the key-board by hand to make contact, and whizz-bang, I had all the keys back! The toughest one I've had to joust with is the KORG 01/w work station Pro-X, heavy as heck and hard to get apart without entering uncharted waters, Ughh! (just to replace that little battery).
pencil did not work for me. i used a more pure graphic. it's called powdered graphite lubricant. brushed it on with a little water color paint brush. it's a dry lubricate. worked great. ps. don't spray contact cleaner on certain types of switches and faders. this is how I messed up my midi board in the first place. oops! ' thanks for helping. great video.
Great video, I also use carbon pencil since having electronic conductor property, but I try to clean off all possible lying dust which makes it not able to have proper contact before I apply the carbon pencil
I'm not sure but ,if anyone else needs to find out about circuit board repairs try Saankramer Electronic Magazine System (do a google search ) ? Ive heard some pretty good things about it and my m8 got amazing results with it.
hey ,if anyone else needs to find out about we repair it try Saankramer Electronic Magazine System ( search on google ) ? Ive heard some great things about it and my brother in law got cool success with it.
No. Not like that, first thing is need to try clean it. some time it just dirty. I did many time and turn out dust or moisture some time make the key not work. Then if it really need to paint, you must use special paint that conduct electricity. We can find it in market.
I spilt a milkshake onto my Korg Triton and I lost use of nearly half of my keys! Thanks to your video now every key works even the ones that previously didn't!!!!!!!
I thought Graphite was something to use in the acoustic piano, never thought that the digital piano also need one. But probably it needs the real Graphite rather than the pencil, it’s an ok substitute but only in a short time, that’s what i heard. Btw it really helps, about using the Graphite in the digital piano, i might need one. Thank you.
Covering the contact with pencil lead, is something that will only last a few days or a few hours... the most recommended thing is to apply a drop of conductive paint on the contacts, where the paint will always work fixedly there, especially on the contact rubber, it doesn't have to be on the keybed... and if the problem persists (which is difficult, the conductive paint solves it by itself) just buy a new rubber... I solved all the problems with the keys on my keyboards using conductive paint... I never had to buy any sets of rubbers again. Last tip, NEVER, NEVER, disassemble the keyboard with it connected to the power... the static can damage both the keybed and the motherboard.
All 4 (E) keys and 3 ( A#) keys to the right of the split point of my yamaha grand piano dgx 230 have no sound. I would like to hear your advice. Wubishet
Appreciate any help. My Yamaha PSR 300 has stoped playing. It turns on snd lights up but doesn’t play. Any suggestions really welcome (easy hopefully) or should I just throw it out? Sigh.. Thanks so much Jillllee
I need help, one of those diodes on my keyboard has burned down... I don't know which diodes go for those keys, that pcb looks same to mine on korg pa800. Can you look it up? Thanks in advance.
The foam on my Roland EM-50 keyboard speakers is perished and sounds awful. Can I replace these speakers myself, or do I have to take it to a technician? And if I connect the keyboard to external speakers, can I stop the sound from coming out of the speakers as well? Thank you.
Sir in my Yamaha e463 keyboard some keys are not working.so i clean the dust from the keyboard still it is not working,so i remove the keys and press the rubber strip it working but after the keys are fixed ,again it is not working.i think some fault in key contact circuit.what shoud i do please give the solution
This is a workaround and does not work long-term.The contacts can also be completely damaged.The keyboard and rubbers must be cleaned with Isapropane alcohol.
always start with a basic clean soapy distilled water FIRST, still not working then you need contact cleaner applied with cotton bud. but remember Isopropyl Alcohol is not good on rubber take care, then there is electrical conductivity spray. or carbon, or copper, silver conductivity paint or pens there also tape and a Key pad repair buttons all from amazon, but to be honest try the manufacture to sell you new rubber replacement. always best is idea but if I had to do it Conductive silver paint - Repair kit - Conductive varnish - 2 grams amazon £8.00 comes with applicator brush just need a dot little amount
"With the Yamaha PSR-740, it can happen that after using the USB emulator for some time, the keyboard suddenly stops working. All keys become isolated, producing no sound. Other functions remain active, but all keys, both white and black, go silent. The strange thing is that if you use the MIDI interface and connect the keyboard to your PC under the control of a program like Cakewalk, for example, the keys regain their sound. However, as soon as you turn off the PC or close the program, they go silent again."
I have been using novation keyboard for 2 years. Recently midi sound in my daw goes very little. Even sound is not heard. Then i restart my pc and it sounds perfectly but suddenly the sound falls down. I use cubase 5 on windows 10. My sound card is also ok( focusrite). Can you help me?
had the same issue. If you open your keyboard and find the rubber contact that is just under your Middle A, you'll most likely see that it has cracked. I tried different ways to to fix the actual crack with no luck. you may have to replace the contact strip for that section. that's what i had to do with mine. good luck.
Hi, sometimes the keys A, F, Cis, A, F ( right side from middle C ) doesn`t generate sound anymore ( same time work or not, all of them ). Do you have any suggestions?
Hi! I Have an old Roland E-70 keyboard with similar problems. A section of keys has lost their velocity, or sensitivity. I have successfylly cleaned another single key and got i working normally. But the problem with these keys (like 6-7 next to eachother) cannot be solved with cleaning. The keys respond everytime i press them, but always at maximum velocity. There is no visible faults, or dirt. Could the cirquitboard be broken? Maybe I'll try this graphite trick...
Figured I’m going to get in trouble by unscrewing and taking apart my piano, I took off a mandolin tuning post to fix my ukulele but my grandma found out. No electric guitar, acoustic guitar, bass, or mandolin,
Fixed it ! .....the earlier clavinovas actually have 4 graphite strips pre key and after cleaning and repainting them 6 times ( made my contact paint with water based polyurethane and graffiti powder ) with no results on the last try before putting it on the lawn , Out of the corner of my eye a tiny glimmer of copper speck flashed on the trace between the next 4 strips , the green material that seals the copper trace had worn off so small you really couldn't see it.... but it was enough to make contact when the the key was pressed.... paint brush and poly urethane over the worn spot..... good as new....there is no way of replacing these board yamaha stopped selling them so bringing them back to life is the only way... thank you for your help , i hope this will help other people keep these alive....
You saved me with this! Haven't played a C key for year because of this issue. But after using the pencil, I needed to clean the with alcohol a bit, to remove the dust. It's working again!
Thanks for the video. I have a Korg X3 and followed your suggestions with 2 key differences 1) did everything with the power off and 2) cleaned the dirt off rubber surfaces with some IPA solution. No graphite pencil needed in my case. Thanks again.
What's an IPA solution? Just beer and water?
@@llms_react lol. Isopropyl alcohol.
Thanks, great video!!! A simple thing to try first before disassembly is canned compression air blast with the tiny straw attached. I just tried it on one of my digi's for 3 dead keys and it worked fine. The lil straw will fit in between the keys and possibly get some air under the rubber contacts (gently ! Don't ever push if you feel any pressure at all lol. IOW, don't try to work the straw under the rubber contacts. Just work in between keys again gentle.) Blast the air for a short blast around the offending key. Don't over do it. Sometimes just a short lil blast is all you need. Reason ? The amount of pressure of air you get out of the end of that nozzle is quite high and might be enough to clear a few microscopic specs of dust.
it's 100% worked for my korg krome. million thanks! i just cleaned the contact with dry cotton bud and use the 6B pencil to draw on the contact as shown in this video. I was doing it with the power on so i can check if it works. since most of my keys were not working well so i decided to draw on every contact. If the graphite are too much there will be short circuit with frequent repetitive sound of that key produced (rather than burning the electric board) which can be solved by using an eraser to remove the graphite and redraw the contact properly. I believe i dun need to change the rubber strip unless the underneath rubber dot were worn out.
Thank you! I didn't play my piano for about 2 months now because of this problem.. Finally solved.
Thank you; this worked for my daughter's Yamaha keyboard. However, I had to resort to a standard #2 pencil, but it worked out great. Thanks again.
The problem with using a pencil to fix contact problems is after repeated hits, the graphite will smear and short out the contacts. Just clean the contacts with isopropal alcohol, and use a proper conductive liquid repair pen.
What is the proper conductive repair pen ? can you link a page to it ?
Not certain about the points made but ,if anyone else is searching for
computer repairing
try Saankramer Electronic Magazine System (Have a quick look on google cant remember the place now ) ? Ive heard some awesome things about it and my colleague got amazing success with it.
Would electronics cleaner work as well?
I also know the alcohol can wipe off the carbon which can really be a problem
i destroyed the key lol and im not proud if it
Thank you so much ! I had a problem on one of my Keystation 88's key. I followed your tutorial and I repaired it, it now works perfectly !
I just tried this on my Korg Triton Le76 and it worked great. Funny, I had the same key not working. F# Excellent, and saved me a ton of money!
Cheers man, appreciation coming in all the way from Uttarakhand, India. This helped me bring my M-audio Key Rig 49 back to life, Keep shining, Peace out, keep on bringing such great stuff.
To anyone watching this video: this is at best a temporary repair, as the lead from the pencil will wear off. What he should have done is clean the bad contact first with contact cleaner, then use conductive paint specifically for electronics and paint the contact areas again for a more long-term solution.
“Contact cleaner” for electronics might be hard on the rubber and description itself is too vague to recommend to anyone.
the conductive paint made of graphite should be applied directly to the contacts in the rubbers or direct to the motherboard contacts?
@@norakatwhy? if its pure alcohol being used to clean, it'll evaporate right off after, so there' shouldn't be any left to make contact with the rubber.
@@norakatactually you use it on CONTACTS and contact surfaces, it evaporates quickly, and NOT on the contact supporting rubber strip. Have to spray it on a piece of paper towel and precisely use it to clean only exactly where you need it
@ 3:55 , the audio jumps back to the beginning.
thought it was my issue!!! LOL
After replace all rubbres i have few super loud keys. Trick with pencil works perfectly. Thank you :)
I didn't have 'le Pen' so I found a soft lead contractors' pencil and now the long dead A#/Bb is sounding again. Works for me, I have a KORG SP-200. All these things, no mater what make, are a mystery looking at how to open/close the darn things, but they all have big chassis screws holding the key-bed down, and smaller screws that hold the end caps and cover plates in place. Not a lot on yt that clearly shows disassembly, so I dived in and did a Fatar STUDIO 90 which is super simple to open, and the harness is easy to unplug. On my SP-200, the harness connect's were impossible to understand how they release, so I just carefully moved the contact's board around with the harnesses connected (that was a lot of screws, huh??). The board looked clean so I just lightly rubbed the 4 contacts to the dead key, stuck my tongue out, protruding a little, maybe a quarter-inch past the lips, and scribed over the conducive surfaces a little, plugged 'er in and the whole upper board was dead, now..realized I had to compress it to the key-board by hand to make contact, and whizz-bang, I had all the keys back! The toughest one I've had to joust with is the KORG 01/w work station Pro-X, heavy as heck and hard to get apart without entering uncharted waters, Ughh! (just to replace that little battery).
You just helped me solve a big problem with my Novation XioSynth! Thaks for posting mate!
Thanks sooooo much. I just fully restored my korg by following your video
Loving the background music
Thanks! I managed to clean with isopropyl alcohol my Arturia - Keystep that was doing the same thing!
pencil did not work for me. i used a more pure graphic. it's called powdered graphite lubricant. brushed it on with a little water color paint brush. it's a dry lubricate. worked great. ps. don't spray contact cleaner on certain types of switches and faders. this is how I messed up my midi board in the first place. oops! '
thanks for helping. great video.
finally a youtube tutorial with cool background music
I really like watching your video 😘👍👍👍💯
Great video, I also use carbon pencil since having electronic conductor property, but I try to clean off all possible lying dust which makes it not able to have proper contact before I apply the carbon pencil
have a cigar for the amazing vid
For this case I use "Granville Electro Connector Repair Kit". Its a conductive glue.
great choice of background music lmao
Pink Floyd 🤘
Came for the keybed, stayed for the music :-P
I'm not sure but ,if anyone else needs to find out about
circuit board repairs
try Saankramer Electronic Magazine System (do a google search ) ? Ive heard some pretty good things about it and my m8 got amazing results with it.
hey ,if anyone else needs to find out about
we repair it
try Saankramer Electronic Magazine System ( search on google ) ? Ive heard some great things about it and my brother in law got cool success with it.
IBM Electrographic Mark Sensing Pencil Leads should be adequate. After a quick clean that is. Good discussion.
Listening to FLOYD is essential to this process I am sure :)
No. Not like that, first thing is need to try clean it. some time it just dirty. I did many time and turn out dust or moisture some time make the key not work.
Then if it really need to paint, you must use special paint that conduct electricity. We can find it in market.
Thank You so much Again finally solved '100% working
I spilt a milkshake onto my Korg Triton and I lost use of nearly half of my keys! Thanks to your video now every key works even the ones that previously didn't!!!!!!!
Thanks mate. The pencil did the trick and keyboard back working.
A soft graphite pencil? Genius!
VERY nice very good God bless you and more VIDEO NEED SRI
thanks for that its fixed about 12 of my keys that didnt sound ...amazing
I wasn't looking for this, but this was still so helpful!! Thanks!
hey thanks a lot ... i fixed my problem with 6B pencil..thanks
Bro you’re amazing! This helped us to fix our System 1 from Roland! Appreciate your video 👍🏼
I thought Graphite was something to use in the acoustic piano, never thought that the digital piano also need one. But probably it needs the real Graphite rather than the pencil, it’s an ok substitute but only in a short time, that’s what i heard.
Btw it really helps, about using the Graphite in the digital piano, i might need one. Thank you.
Love the song selection... long live Pink Floyd
You haVE to off the power before u open it. to avoid short circuit.
That's very obvious
Covering the contact with pencil lead, is something that will only last a few days or a few hours... the most recommended thing is to apply a drop of conductive paint on the contacts, where the paint will always work fixedly there, especially on the contact rubber, it doesn't have to be on the keybed... and if the problem persists (which is difficult, the conductive paint solves it by itself) just buy a new rubber... I solved all the problems with the keys on my keyboards using conductive paint... I never had to buy any sets of rubbers again. Last tip, NEVER, NEVER, disassemble the keyboard with it connected to the power... the static can damage both the keybed and the motherboard.
Worked for me! (tho' putting a Korg M50-88 back to gether was super hard).
Excellent background music
Hey man. If u still out there. I just wanted to know. On that main board . Is there a ground? If so what would the ground be please.
Sir can I use electronic conducting paste instead of graphic pencil. It conducts very well
thank you soo much!!! I've had my piano abandoned for so long for this problem
yuly davila ns
Great job! CONGRATULATIONS! 😍❤️💯👏
All 4 (E) keys and 3 ( A#) keys to the right of the split point of my yamaha grand piano dgx 230 have no sound. I would like to hear your advice. Wubishet
You can buy a "conductive ink" pen to make a lasting repair I would guess, the pen uses silver or copper in its "ink"
Great background music :))
Hi, can you assist me in finding the service manual for Kurzweil SP76 Stage Piano? Thanks
Iwould love to learn more about doing keyboard synth repair are the kits that i can buy
Great music man, my fav Floyd songs!! Also great help for my keys!!
I cleaned contacts with alcool isopropylique 99,9%, and it works. Is your method better than mine?
Right at 3:55 your sound went back to the very beginning of the video .
Thank you verymuch for this video it helps a lot😉😊😀
Appreciate any help. My Yamaha PSR 300 has stoped playing. It turns on snd lights up but doesn’t play. Any suggestions really welcome (easy hopefully) or should I just throw it out? Sigh..
Thanks so much
Jillllee
What happens if you plug in headphones?
How long is that going to last? Or is it just a temporary fix?
Aaaaaaawesomee!! It worked for me. Muchas gracias :) greetings from Mexico 🇲🇽!! :)
I want Roland bk3 keyboard volume. Can you help me get one?
It worked for me! Thanks bro
Thanks for this useful info
I need help, one of those diodes on my keyboard has burned down... I don't know which diodes go for those keys, that pcb looks same to mine on korg pa800. Can you look it up? Thanks in advance.
The foam on my Roland EM-50 keyboard speakers is perished and sounds awful. Can I replace these speakers myself, or do I have to take it to a technician? And if I connect the keyboard to external speakers, can I stop the sound from coming out of the speakers as well? Thank you.
My Yamaha not playing beats accompanying but does only melody
Solution plz??
wow thank you man your video and effort is appreciated ...this worked like a charm
Sir in my Yamaha e463 keyboard some keys are not working.so i clean the dust from the keyboard still it is not working,so i remove the keys and press the rubber strip it working but after the keys are fixed ,again it is not working.i think some fault in key contact circuit.what shoud i do please give the solution
عرفنا كيف ننظف الازرار كي تعمل لكن ان كانت الازرار فاصله من المصدر كيف نعرف انها فاصله وكيف نحدد مكان الفصل ونصلحه
and thank y
Hi thanks for the video..but what if the rubbers have finished .theycant play how do you get them to work again
Big help brow...:) thanks much..🙂🙂🙂🙂
Does charcoal soft pencil can used?
This is a workaround and does not work long-term.The contacts can also be completely damaged.The keyboard and rubbers must be cleaned with Isapropane alcohol.
always start with a basic clean soapy distilled water FIRST, still not working then you need contact cleaner applied with cotton bud. but remember Isopropyl Alcohol is not good on rubber take care, then there is electrical conductivity spray. or carbon, or copper, silver conductivity paint or pens there also tape and a Key pad repair buttons all from amazon, but to be honest try the manufacture to sell you new rubber replacement. always best is idea but if I had to do it Conductive silver paint - Repair kit - Conductive varnish - 2 grams amazon £8.00 comes with applicator brush just need a dot little amount
Wwwcasiocompanydisibutior
Ofindia
pretty solid advice
Isn't the issue in the rubber side, not at PCB side?
Does it may work in a Yamaha P 95? (Sorry if i wrote wrong, Im from Brazil)
Thank you 👏👏👏👏PINK FLOYD FOREVER✨✨✨
Hi brother I hope you can help to fixes my piano power not turn on
why wouldn't you power it down and unplug power before taking it apart?
I have big problem in my Korg n364
Power supply smps totally damage
I want to purchase new power supply smps for My Korg n364
Plz Help me sir
Thank you that was most helpful...
mine does that none of the keys sound just randomly and then i have to turn it off and on and i get a blinking red light :( it's a yamaha p-35 :(
Amigo tengo un yamaha SY99 le conecto audifonos a la salida de audifonos y el volume se escucha muy bajo que podra ser ?
Is this applicable on any keyboard? I have a Yamaha P70 and a BIG Evolution pencil. Will it work?
"With the Yamaha PSR-740, it can happen that after using the USB emulator for some time, the keyboard suddenly stops working. All keys become isolated, producing no sound. Other functions remain active, but all keys, both white and black, go silent. The strange thing is that if you use the MIDI interface and connect the keyboard to your PC under the control of a program like Cakewalk, for example, the keys regain their sound. However, as soon as you turn off the PC or close the program, they go silent again."
Thank u sir
Sir if keyboard batan is not working to hum kya kare
I have been using novation keyboard for 2 years. Recently midi sound in my daw goes very little. Even sound is not heard. Then i restart my pc and it sounds perfectly but suddenly the sound falls down. I use cubase 5 on windows 10. My sound card is also ok( focusrite).
Can you help me?
Thanks for the video. may I ask what brand is the keyboard controller that you just fixed ?
That's a Korg Kontrol49
please help ,one loud key , middle A , cleaned circuit ,contact under key , clavinova 550 ? tried everything
had the same issue. If you open your keyboard and find the rubber contact that is just under your Middle A, you'll most likely see that it has cracked. I tried different ways to to fix the actual crack with no luck. you may have to replace the contact strip for that section. that's what i had to do with mine. good luck.
What if a key is too loud....Technics KN6000
Hi, sometimes the keys A, F, Cis, A, F ( right side from middle C ) doesn`t generate sound anymore ( same time work or not, all of them ). Do you have any suggestions?
Hi! I Have an old Roland E-70 keyboard with similar problems. A section of keys has lost their velocity, or sensitivity. I have successfylly cleaned another single key and got i working normally. But the problem with these keys (like 6-7 next to eachother) cannot be solved with cleaning. The keys respond everytime i press them, but always at maximum velocity.
There is no visible faults, or dirt. Could the cirquitboard be broken? Maybe I'll try this graphite trick...
Did it work ??
Thankssssss!!! So wonderfull 🥰🥰🥰🥰
Figured I’m going to get in trouble by unscrewing and taking apart my piano, I took off a mandolin tuning post to fix my ukulele but my grandma found out. No electric guitar, acoustic guitar, bass, or mandolin,
Gonna try with mine to see if i can fix mine i had like 90% of my keys out
Help, every E and every Bb across entire Yamaha 220 not sounding, suddenly. Have you heard of this? Do you have any idea how to fix?
Сдул пыль от карандаша на клавиши.Сразу видно профессионала.
Bro what is that board name.?
so drawing with 6B pencil do the job! thanks
NO! do not use a pencil. Use rubbing alcohol and light clean across the parts. Fixed these kind of keyboards back in the 1970's.