Samsung NP-300E laptop, motherboard repair
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- Опубликовано: 13 окт 2024
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Thanks!! I had a laptop with same situation and I followed your method to diagnose and able to fix it. The Joy when I saw hat green little light on the board was so amazing seems like I won a little lottery!! Thank you !!
Please make video on what is south bridge, north bridge how to trace the 3v and 5v power supplies...
Pls pls make a detailed video on this..i am a beginner i have a very Little knowledge about how this power supplies works.
Sorin, great video as usual, very clear & easy to understand, i'd greatly appreciate if you would do a component run down on a future repair, small capacitors, resistors, fuses all look very similar, a lot of them with no visible markings leaving it very hard to identify the values unless you have access to schematic drawings, i would really appreciate it if you could explain how to identify the more common types, many thanks again, keep up the great work
Thank you, yes, i will do
Thank you Sorin, really appreciate all your efforts.
Good question. I also have this problem
Hi sorin great video well explained,and as you said ask any question! I have one,I have a asus stream I'm trying to fix and the first two mosfets are faulty,can I jumper 2 mosfet,and I know you don't like to do this.but if you were too how would you do this😊 your the man
Thank you ! You contributed to save one more laptop today : same motherboard, problem, solution applied and satisfactory result ;-)
You are fantastic / no music / straight to the point / well done / thank you AAA+++
maan i love your vids and especially the humor
thanks
you have a '' ha ha ha'' very special, are you a russian man or german? your face says so..
I stumbled across your videos today, you do a great job with explaining what you are doing and why.
fun to see these after the more recent ones. many more views these days I suppose :), I always love your videos, your humor and how you do dogy solutions. They seem perfectly fine to me given the time you spent and the price one pays, also because you know it's not dangerous. Thanks for your contributions! And yeah, I know what you mean with the proximity sensor, so many poor manufacturer implementations and bad replacement parts :). cheers!
Thank you so much. You are the best!! I have learned how to finally fix my samsung laptop myself. I even paid a repair shop to fix it and it still came back broken! I should of just sent the money to you.
thats fantastic :) Good job
Hello great video. I have a similar laptop and found a sign of burnt onto the motherboard. I thought it was the charging port which I replaced. I have power (green light) but no screen and no booting. Do you think it's repairable? Can I send you a photo?
You are a great teacher, you have saved me, and I have learned a lot from your video, thank you very much
if your checking computers, isn't it best to have the schematic.? for someone such as yourself if your repairing many laptops, you get used to the circuits, but for someone who may just have started checking laptops, would they not be best to try get the diagram first of the board to gain experience ? A silly question maybe, if you remove a component from the laptop and that components has a 'very small internal resistance;, but the laptops works once you remove the component, does that put extra stress on the remaining components, EVEN if only a very small amount.? GOOD JOB, !!
Yey yeh yes
Very good person ....I hope you are happy all days
I love the way you teach thanks a lot
Excellent as usual ! Perhaps when next you are establishing voltage at various points, could you provide closeups of what you are actually checking please ?
Hi Sorin.
I really enjoy your videos.
I had to repair that very same laptop (brand and model) a couple of weeks ago.
Same fault so I was going to take the same approach as you did, but watching this video gave me some more confidence about it :)
Only thing is I screwed up and managed to blew away that tiny capacitor next to pin 8 of MOSFET AON7200. When I tried to resolder it
I couldn't hold it in place, it kept sticking to my pliers instead of to the board, so it wouldn't stay in place.
I'm obviously not good at soldering so, and I could use a steadier hand but with this kind of tiny parts (not sure if it's a 008004),
do you have any special tricks/technique to solder them?
Thanks!
I recently had this exact issue with an identical laptop and I revived it in the same way, however I'm curious about two things which may or may not be caused by this "repair": I noticed the laptop "double-posts", so you press the power button, the logo comes up and then it briefly shuts down before finally staying on (CMOS battery is ok, in case you're wondering). Also, would the battery still work as normal ? I actually found this laptop as junk and managed to fixed it thanks to you and since it's decent, I'm thinking of investing in a battery for it, but ONLY if the charging circuit still works, otherwise it would be a tremendous waste of money...haven't looked at the schematic to see what that transistor we've bypassed actually does. Cheers and thanks.
It is protecting the board, it switches off if there is some short but most likely the second mosfet would switch off, not the first. Since the first one was switched off, I assumed the second mosfet was on short so the first one switched off. He tested for short with the power supply and there were no power taking, so no short.. This one was just faulty mosfet, there was no short, nothing caused it, that's why he said it was ironic, the mosfet that protects the board actually caused the problem.
@@Marko_Djuricic I'm interested to know what he's doing after he has removed it, I can't see what he's doing with the solder
@@davidpringlepatrick4262 He is making a bridge to connect the source and the drain (4 pins on one side, 3 pins on the other side). He could do it with the piece of wire but he is too lazy :D Get it?
unfortunately the brightness in that part of the plate is too high
a query the bridge on the left has the 4 pins and the one on the right 3? What is the pin that is not bridged?
@@ronaldcancino6279 gate pin
Wow! I love the way you work and how you explain the way you do your job. But a question arises to me, can it cause problems not to put the integrated one? A greeting and thanks for showing your work.
Hello, do you know the value of those inductors (i've seen a schematic that indicates they are inductors)(those two you say they are resistors?) near the power jack? Or the reference? Thanks. Love your work, you are one of the few that explains in detail what you are doing.
Edit: Found those components: They are HU-1M2012-121 inductors / 6A 120 ohms
They'll only measure 120 ohms at 100mhz+ for high frequency filtering, so when measuring using a multimeter they should be measuring less than an ohm...milliohms in fact. That's why he jumped it... it'll be alreeeet!! 😊
when you replace a mosfet by solder, which pins you should link together and which one you shouldn't, i saw you did not solder the top one...
adel saidi he connected the source and the drain and leave the gate part. it acts like a switch and its ok to bypass that mosfet by solder or jumper wire as per Sorin.
Hello sir
What did u done you have short source to gate please explain we did get proper
I have acer laptop top 5742 .Powers on (fan is on ,andpower button light is blue).without pressing button ,but no signal on screen.. Parts of motherboard extremely hot.Thanks full for advise . YES Thank you for the great videos.
nice video very informative but i have a question if if we get amps from the power supply what does that mean. it means that the switches are fine but we must to find capacitors or something like that who creates heat and is shorted or still we replace the switch . am i wrong ?
if a board is taking 1-2 amps at 19v, its ok, but if its taking 1-2 amps at 2 volts, its short. Thats how the curent limit works, lowering the voltage
mr.sorin you are the best. i learned a lot from you i wish you all good in the new year 2021
HEY, I am a great follower of your videos, have samsung np300e with no display also I din't get clearly what you did after removing the cheap what did u solder? pls Explain.
Love the way you sorted out the problem.
Thanks for sharing such valuable videos..I have samsung R409 power on but no display..while checking no volt in ram and ram coil..So please guide..
hello sorin, ive seen you using a jumper wire over the mosfet just to bypass the mosfet. what is the size of the wire that can be used to bypass the mosfet? can i use a jumper wire that is used in repairing smart phone? can it handle a 19 volts and the amps that the laptop is drawing?
Sorin, could you tell if it is easy to make an accidental short circuit and burn something on the mobo when using a multimeter? Thx in advance.
Hello, i didn't see all your videos because you have a ton of them. I try it but it will take me a while till the last one. I descover you two days ago. You are greate.
Do you have allready a video about diagnostic a Laptop to finde faults without open them to the max?
That will be very interresting i think, because of all your experience.
Hi Big Boss your vids are so cool Keep it up
I really apreciated your work, time and explanation. Really thanks Sorin
You are the best!!
I have the Same samsung laptop NP-300E5X. the problem is when i connect the charger the green light appears at the same time the red flashes and its not coming on, what might be the cause of that sir?
I have 19v, 5v and 3.3v but no 1.5v. Please help Sir!
Did you replace that component? It was designed there for a reason!
Don't worry, i'm the redesigner :)
is it worth picking up a laptop on ebay for repair or parts to fix it for personal use? Seems to me those laptops are picked clean so refurbishing them could cost more than $100 dollars, but if you can get an i7 for 30-40 dollars and the motherboard boots to bios, it might be worth it?
Sir i have samsung 300e but problem is without battery laptop is going on but when i attach battery laptop not on.how to solve or if you have any video link plz share to me.
Hi Sir did you changed the defective IC?
"Follow the 19 volts" No better way to say it ! Excellent
Hi, Sorin, I have a notebook samsung np300e4c with problems in battery CMOS. It's possible to replace it?
Hi. I admire your work very much. Could you explain me which solder pad you connected to cheat the circuit? It's hard to see. Did you connect all the pads ?
already explained, check the video 'about motherboards'
Still looking for motherboard video
great explanation as usual....i love your raw videos....pls do regular updates....and pls troubleshoot different types of problems
Hi sir i have the same laptop samsung np300e but the problem is that the backlight isnt working i tried replacing the whole screen but still no light i think the problem is in the motherboard. Can you make a video about it or give ideas where to start checking signals / troubleshooting from the motherboard..thank you so much
Solution?
O que foi que ele fez? apenas fez uma ligação direta para a tensão passar sem precisar da tensão do GATE?
Thank you very much. You are best teacher. I have a question. How can i know in battery, if i have problem with some component, or i have problem with Deleted RAM Memory in a battery chip? I have 2 laptops. 1. have waterdamage issue, 2. battery stopped to work for no reason. First laptop is new and second 4 years old. I repaired tham both thanks to youre help. Second one shortcuting both first mosfets. TY :) I think if there is some problem in laptop, charger stops giving power, so no problemo.
how do you keep track of all the screws you take off and how they go back into place?
thank you so much Engineer. am actually learning alot from your work. i have a Hp 2570p, it automatically comes on when power is plugged in but no display. please what do you advice
for the automatically coming thing probably has something to do with cmos.but for the display it's either a display problem or a graphics chip problem watch his video in which t has the exact same problem.
thanks mr.florin,, your every explain is very clear,,, it is very useful, i seeing your all videos,, keep it up,, give us different different tutorials,
thanks
My name its Sorin, but its ok. Thank you
so great sir. But how to affect motherboard to keyboard and how to repair this type of problems ??
Hi sorin. Heard that if u disable grafic chip power by removing its coil then the motherboard will not recognise grafic chip and will start. Cpu should have integrated grafic also and switching one. Is this true?. How to know coil of that grafic chip without schematic. Thanks
Hello,i love your video, i have Samsung 300e5e and it has a charging problem when i open it i found that one chip near the battery contact is burnt. Pls how can i repair it thank you
Customer brought me with same problem but bridging mosfet makes battery faults, better to replace the mosfet .
Nice video! Do you replaced the mosfet?
Ok. Thanks!
Hi, any video to show how components work and how to test them?
i smile when you forgot to plug in the charger,but your so good men.....good job
id love to see if you could repair my old msi stealth pro. MSI said the whole mobo needed to be replaced and cost 1500euro to fix without telling me what the issue was. They pretty much point blank refused to tell me why. I did send it back before then toward the end of the warranty for cleaning and to fix the screen as the hinge damaged the cables to the screen. The same issue re-surfaced a month later and as I said they refused to tell me what was wrong.
Please guys help me out. Where is the video he mentioned in the video about the basics of the laptop repair? Thank you
Very good well done but can you show me repairing a Samsung Np355e5x a02in laptops dead motherboard please.
You are so knowledgeable person in universe
You are a genius
You are amazing man,I consider you like my godfather in electronics thank you very much,
I learned a lot from you,
i just want to know what capacitors really do in circuit?
Good day we have a the same motherboard model and also no power but i have 19v the chip you've remove..I Can't proceed . MAy I ask what is the next procedure for troubleshooting. I hope you can reply
hii sir, i see yr vdo's u make all repair job very easy.But sir i hv a ? that u short the main power mosfet so is it possible that laptop run for a long time
ruclips.net/video/eHAysowx6ow/видео.html
hello sir. thank u for u r amazing videos. i was wondering if u could make one explaing how power flows from laptop dc jack to other components. cz i been trying to fix hp 6930. and when i measure 19v at the first two mosfets. at the source i get 19v at the other end (drain) there is no voltage at all. now what confuses me is there is voltagt at some ics' in the board. thank u sir.
Plaease say me what instrument you used while taking out the small chip as fast as you can. Thank you
You mean tweezers or hot air soldering iron?
Hello.. my Samsung 300E5C laptop is not coming On. However the green indicator for power available is coming on immediately I plug in the charger. But if press the switch, still not coming on? What then could be the problem? What should I check for?
Sir can you please let me know if I can upgrade this mother Board to a compate higher processor
Hello need your help here. I have the same model of laptop, when I turn it on it load for long and goes to automatic repair. When I try to install windows i can't go pass "getting ready for installation, I will get errors at that point. Have checked and certain that there is no problem with hard disk, RAM and the installation usb drive is also fine. I don't know if the sata cable is working well. Kindly help.
Great video, real content. Keep it up. God bless
I have this laptop - NP300E5C - When I press power it does not post and cpu runs at full RPM. I think this could be the bios. I have a CH341A Pro Bios programmer.... still a beginner and practicing. Would you be able to tell me where to find the bios on this motherboard? Schematics I have does not show me where to locate the bios chip.... Thank You
I have the same model, it power on and samsung logo shows but then restarts.
Cannot get to BIOS and fan is working well.Any ideas?
Removed cmos battery and ist 3.2v measured, put it back but the same thing.
i have the same motherboard...it switches on and off after 1-2 seconds... the 19v power is ok...there is 3.3 on bios chip... plz advise. thx
I have a samsung laptop NP300E5A and recently gets overheated and shutsdown abruptly. the local laptop repair guy says the graphic card onboard is getting overheated and this forces shutdown... can you help me get throught this ?
I have the same problem, thanks for the video its helped me out
Hello Sir I have Dead motherboard Problem With Apple MacBook White Unibody 13" 2009 model A13 can you please make a video About it but Step by Step Lesson Thank you so much your the Great guy Thank you have a good day
espectacular video
To use power supply you need to know where the ground?
You are wonderful Person From Adel Germany
I hope someone can help me🥰.
When the power cable is unplugged, the red light stays on
Hi am John from Ghana. I love your videos and humor. I have a question. I flashed a bios on a dell n7110 laptop and after there is no sign of life in the laptop anymore. What could be the problem Pls.
thank you, probably the bios, check online if you can rewrite the bios via usb and do it
Electronics repair school I used a device called ezp2000. I downloaded the bin file and flashed the chip. And no sign of power in the laptop. Not even a charger light
voltage on the bios chip pin no 8 ?
Electronics repair school are you on Skype pls
john.halm my Skype name if I can chat with you there
You´re the king, thanks a lot man, i admire you and you work, genius!
what is the soldering lead you use?can you give me a link to purchase
you can buy any from ebay
Electronics repair school do amazon affiliate!!!!!!
i have a Toshiba satellite laptop L505D-S5983 .and the Ac power adapter plugin only the dark screen is there it only have one green power light is on and no power and when I put the new battery in it try to start the laptop how can I fixed it
Great Explanations ,thanks
you save my life thanks alot bro
what?
can you explain how to check a mosfet with multimeter in-circuit without a charger plugged, thank you
From my experiences , a mosfet can work fine or can be in short, so check only if they are in short, otherwise its no point. But, let my find a job with dead power supply on the motherboard and i will make a video in detail
So I've just seen at 0:23 that you live 5 miles from me omg amazing where is your shop
i have same board, after i change nec tokin to 4 330uf capacitor it wont display but with power the fan spining contiuesly. please help?
My samsung np300e5z.. Problem is....charging is ok power is on fun is spinning but in 2sec fan stop and power is off..can you teach me how to fix...thank ypu
Hello i got laptop same that u fix but the laptop have power but no display can u help me how i find the problem??
Very useful thank you for sharing this video.
where is the video card located
I have a laptop showing 100% Full I have checked the mosfet you are checking but they are ok
what type of soldering lead sir can you give me a link please thanks
any kind from ebay, its nothing special
Hello, i have the exact same laptop computer. when i plug the charger, it shows green without battery and orange with battery attached. when i push the power button the blue light on the power button turns on and the indicator below the trackpad also show blue and screen dark. no fan spin, no hard drive movement, no power, also tried with HDMI, no activity. i took it apart and cleaned everything, put it back together its the same problem. i left the computer for more than a month and decided to try and turn it on, it turns on okay and everything works fine but then died during windows update and stayed dead with the same problem for more than a month. not the battery, not the screen, not the hard drive, not the RAM, not the charger, not the charger connector. apparently laptop turns on but not on. do you know what the problem will be? thanks.
Nice Video, Thanks for sharing this video
hi sorin to clear password from all laptop do just change out the bios chip
Sir i have the same laptop
I disassembled it and it was turning off after 5 mins or 10
Then i installed fresh windows then it worked fine but after 15 days it suddenly turned of and now it does turn off the light is on of the on button but no display nothing
i HAVE WI-FI BOOSTER 15 CM FROM NP 300E5 E AND RECEIVE 50 % OF WI-FI SIGNAL. I THINK PROBLEM MAY BE DIRTY CONTACTS AT WI-FI BOARD PINS TO MOTHER BOARD. FOR AN OLD MAN IS THE REMOVAL AND INSTALL OF THIS SAME WI-FI BOARD DIFFICULT ? SHOULD I TAKE TO REPAIR SHOP? i HAVE DONE SIMILAR WORK BEFORE SUCCESSFULLY ON TOSHIBA LAPTOPS.
Salut Sorine, am ul laptop identic cu aceiasi problema , nu am inteles bine ce ai facut ai scos mosfetul ala si ai facut o punte?
Salut, exact
Multumesc
you earned a sub awesome job