Vizio LCD Powers on with backlight, Wont power off, No video
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- Опубликовано: 19 окт 2024
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Repair on a Vizio 37 inch LCD tv that will power on (power supply is ok), Backlight lights(inverter is ok) But has no video and will not turn off with the power button or the remote. Repair involves voltage measurement and IC regulator replacement.
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finally a good technician, a technician that does everything how i was taught. this guy is good at what he does and has excellent troubleshooting skills, i am like him in that i go right to the problem. fantastic, and he doesn't make a fake electronic repair video that if copied can have really bad effects as i have seen on many videos. keep learning from this guy cause he knows what he is doing.
I stumbled upon this video while searching for a LCD repair of a tablet and was amazed at the amount of detail provided in such a short period. Your calling has to be teaching!!!!!!
I picked up this same TV sitting by the curb last week, owner had pulled it from a home they were remodeling and didnt have a power cord to test it.... so they just threw it out.. I brought it home, fired it up and ran into this same exact problem. I wasnt able to test any components because my multimeter was dead, so i just Swapped out the controller on U33 and presto, Works perfectly! Thanks to your concise video i have a new TV, new to me atleast :D
My vizio looks the same like this, had the same problem, I learned from you and found u5 bad, used a chip 1117 from scrap board my workplace to replace it, it's working right away. Thank you a million for your kindness.
Thank you from the bottom of my heart for this informative and detailed how-to. My JVC was having the same symptoms. I watched your video, ordered the regulator, bought a soldering iron and fixed it myself (having never used a soldering iron before). My husband is amazed.
Wow eight years later and looking at thru your old video on a vizio lcd tv , I replaced friend's tv with a new one he bought because this one wasn't working with the same problem and sure enough following your testing and found the same regelator bad, replaced it from orderings to from digikey and now I have a working 42" tv with a great picture . Thanks for your skills .
WOW!!! I"M SO AMAZED! I don't know how I came around to see this video but just recently our same old vizio tv did the same thing, gave it to the tv repair shop and totaled to about $240 dollars! I swear with this video I could have saved so so much!
THANK YOU! I just fixed my 42" Vizio with the exact same problem thanks to this video. The only thing I would recommend is to make sure your soldering gun is a good one. The solder on the board melts at a much higher temp than the solder we used to put back on. But this video was great and I really appreciate you saving my TV.
I've seen many tv fix it videos and you are the BEST bar none. Having a problem with my Vizio 42 inch plasma vp422hdtv10a where it won't turn on. I did a reset a week earlier and worked for five days, but now only the amber light and clicks twice and shuts off with one click. PS board gives a two green blink led pause for 4 seconds and two blinks. Ordered a power supply board that comes tomorrow and hope it fixes it. Not all that confident though. Will check out more of your videos if I have a problem. Again really great videos!
Great video. I watched a few videos across RUclips to get a proper understanding, and I have to say, yours is the most comprehensive and hands on. It does seem these regulators are a common problem. I feel pretty comfortable going after this now. I'll be sure to post updates once I get through it.
Hey Norcal! Because of a previous video I was able to fix the power board on a vx32L that someone had tossed in a recycling dumpster. Replaced the capacitor R909 (63v 47uf) It now turns on with backlit with no input response like this video shows, where before the VIZIO logo would light up white and switch back to orange. Appreciate the videos, more people should have your mindset
I also have the vizio 42 that had the identical problem. Thanks to your guidance and excellent video and explanation I was able to repair mine for only $6 and about an hour of time. Thank you again.
Thank you for having the best repair video on the planet. I'm new at this, but somewhat mechanically inclined. So doing this fix is a new adventure. I just got my parts tonight and will try the fix tomorrow. I have shared your links to a few on different forums that were so having the issue. 2007/08 vizios are lemons, but an easy fix, thanks to you. Thank you so much. I have the 32 in 3 plug-ins on the pr board and can't recall where the multi color one goes, next to the white, or on the end :0(
Better alternative than throwing away entire control board. Thank you, sir for your good work.
So I found this exact TV ready to go in the dumpster, and I checked it out and left it over night! When I got home I found your video and it was the same TV and exactly the same problem! So in the morning I grabbed it! I had my friend come over and take the readings and it was the same regulator that was bad! This was unbelievable to me! So I ordered the part and My friend will replace it for me! Hopefully it woks!
Thank you so much! U33 checked bad I ordered the IC regulator, soldered it in and works great! Had it on for over ten hours with no problems!
My TV had the same problem. I watched this video a year and a half ago and it helped me fix my TV. A 75 cent regulator is whole lot better than buying a new TV. Always look for bad caps too. Haha, thought you finally deserved a thank you Norcal715!!!
thank you so much for the video,got the parts on ebay,fixed myself,tv works again,saved me couple hundred bucks over buying a new one.Hope to get a few more years out of it.Thanks again.
Thanks for the video. 14 year old TV staying out of landfill. $0.85 voltage regulator ($5 shipping) fixed the problem as diagnosed.
Thanks a lot man, my 32" comes alive once again after couple years in the storage room, all this time I was planning to go with the technician and spend some money, hahaha, I spend nothing thanks to your video and used a AS1117L from computer dead monitor, it works perfect.Good bless you.
Dear kokoleka808, thank you so much for the encouragement. I have the mainboard in a box untouched since my 3rd attempt at getting that reg off. You have motivated me to try again and be persistant. The TV is still setting in my living room on the floor. So if I succeed, you will be the first to know :0) thank you again..... Deborah
Hi,thanks to you I just repaired my Vizio 42 inch that had the exact same issue that your video described. My 15 watt solder iron was not strong enough so I purchased an inexpensive 45 watt from Radio Shack. My work was not as pretty as yours but did the trick. Thanks again for the tutorial.
Just repaired my vx42l using your video, Perfect fix. Nothing like a seven dollar piece from ebay to save a tv. Thank you very much Keep up the good work./
Great video indeed! Fixed an old friends VIZIO for $2. THANK YOU!
Yes you just have to run a "jumper wire" to replace the lifted copper trace. It just needs to go exactly where the old trace used to go.
Thanks so much man you helped me fix my tv and made me look like a hero in front of the family!!! You are the MAN!!!
thanks a lot I had the same problem, now i am about to buy the same part. and I also loved the comment you made at the end "to keep another TV out of the land fields" God blessyou.
It worked! My solder job was terrible, but good enough I guess! Thanks for helping me extend the life of this old tv!
mcormic97
If you happen to be in North America. i.e Retardistan you cannot say SOLDER.
For inexplicable reasons they drop the L and say SODER.
So perhaps instead of saying I SOLD my car' one would say I SOD my car.
Its a weller temp controlled set to 700F. Its old school about 20 years old, uses a magnastat but it works very well. Model is WTCPN
On some of the more complex problems I have to pull a diagram but in most cases no. IC pinouts are very helpful and usually thats all i need.
My 2006 Vizio VX32L has finally given up the ghost, and the video describes the symptoms perfectly. For a $3.00 part and a little soldering (I've never done it before) I may give it a shot. Thanks!
@NorCal715
😀👍🏻
I had exact same symptoms and u33 tested as video...replaced u33..tv works great now...thank you
I watched the entire video. Thank you for the lesson. Before this video, I didn't know how to test to see if it was working.
Thank you so much.
Awesome! Same problem, same voltages on the same regulator on two different boards. I bought a used board. The T.V. did the same thing. Thank you very very much.
I had the exact same problem present itself. I checked the voltage on U33 and U7 and came up with almost the same voltages. I drew pictures of them and wrote down the numbers for each pin. I ordered two of the 1117 part from digi key... arrived in two days regular postage. The part cost was .77 cents, with postage... under five dollars. I photographed everything from start to finish. I replaced U33... plugged the unit in, hit the power button... checked the readings on the new part... back to where they should be. I got a blue screen within seconds of pushing the power button. One note... do not use acid/core solder... its messy. Pete K, below suggested using silver bearing solder or lead. I still ended up with good solid solder joints and it worked, but it was more difficult to control the solder. I would also suggest that you solder the output terminal first, as it is the largest terminal. As you mentioned in the video... you need to hold the piece down when you make the first solder joint... a pencil works great using the eraser end. Once that has cooled... solder the other three. Watch out for something that is really close to the input pin, (some refer to as #1 pin)... it is very close and easy to get solder on. I filed the tip of the solder gun to a point... like a pencil... not as sharp as a pencil... but much better than it was originally. I did this by removing the copper tip and putting it in a drill. This made it easy to make an even tip with a fine file. After that I used some emery cloth to make it smooth. Thank you norca715 for the great video.
check5v 12v fuses
Hi what if replaced the mother board
Thank you for sharing the knowledge! What temperature are you using on your soldering iron, out of curiosity ?
There are so many checks to do here that you tube does not let me have enough characters to type them all, not to mention the time that it would take to do it. Also you still may have a backlight problem! If you can find a cheap used board then it may be worth a try.
Repairs are typically simple enough once the arduous task of troubleshooting is complete. That's where the skillset comes in.
Are you sure you got the correct main board. Then same model number may have several different LCD panel makers. Did you order by serial number (very important on Vizios) can you send it back? it could be just a bad board. Someone else commented that you could swap the eeprom from the old board over to the new board and that should repair the problem. The eeprom is the memory ic that has the software and operating system for the tv.
Wow...you're good. Wish I knew how to solder. Was very interesting video. If replacing my inverter board doesn't fix the problem I have (dark screen on the right side...takes about 5 minutes to warm up and give me a clear picture), I'll see if I can't find someone to tinker with the main borad. Thanks for sharing your knowledge.
Is this a Plasma? Whats the model number? (LG made a 32" for Vizio) or a LCD? If it is a plasma is starts with "VP", if so check the edges of the screen for cracks.
I would say that based on the video and your notes, most likely a main board failure, try and unplug the LVDS cable and see if you can shut the set down with the power button. could be a tcon loading down the main board but I doubt it.
Nice repair! I'd add a little flux on those joints (even if you're using rosin core). It helps the solder flow in the joints and you'll get a more solid connection.
my vizio tv having the same exact problem. no picture and wont turn off but now i know what to do. thank you!
The inputs should always be a standard voltage 12V, 9V, 5V, 3.3V. The Standard output voltages are 5V, 3.3V, 2.5V, 1.8V, 1.2V. So if you have a IC that only has lets say 3.8 or .9 volts out but has a solid 3.3 or 5 volts in you would suspect that one. Use the 1.2 + rule as in the video.
Thanks and no thanks for posting the video! I was able to repair my television but now I cannot justify getting a new bigger set. However I was able to justify buying a nice new solder station to make said repair and now have a great solder station for the next project.
@norcal715
My Visio HDTV--the exact same one as described in your tutorial--had the same problematic symptoms. I must admit that I have limited experience in repairing HD televisions--especially when it comes to troubleshooting and soldering parts onto and off of the main board. So when I was able to breathe life back into my HDTV--thanks in large part to this tutorial--I was totally blown away! Thanks a million for saving me hundreds of dollars in repair costs and/or hours of troubleshooting.
So I did the same checks you did. The Voltage regulator you tested at 4:10- were all 0.0 volts. The other regulators were good except U33, the input of that was 71+. So should I replace the first one first? Or both?
Hello : I was just wondering if you can explained how did you determined the bad regulator being bad when the two last regulators were giving you unexpected voltage readings,the last one was taking the output of the one you found to be bad , can you make that clear for me please,if it was me, would've replaced the last one and not the one you replaced. Thanks for your expertise , great work , love it .
your pix shows the meter in the DC volts position measuring up to 200 volts. for more accurate measurements just put the knob in the 20 volt DC range. Black lead go's to the chassis ground, red lead is measurement lead.
norcal715
Its a weller temp controlled about 30 years ond but it works great WTCPS model The camera is a Panasonic point and shoot with HD video. Thanks
Try 60/40 or 63/37 lead/tin the board solder is lead free, but the melt point of lead solder is lower. You should get it at a hardware store or radio shack
Wow thank you so very much for this DIY! You're a pro! I was given this same T.V. set and it has the exact same problem. Were all of the resistors the same part number? They were just step downs? My soldering skills aren't as precise as yours are. Do you have any tips? I have a solder iron, flux and solder- by mine always comes out messy! Thanks again. Great video!1!
Wow a technician that can actually teach what he knows! Thank you very much! Great Video. So many service manual don't give schematics any longer. Have you ran across this problem? I see you made this repair without a schematic. Is this common for you not to need a schematic?
Thanks
That's so cool. I have the same issue, but couldn't get the solder hot enough to get the IC reg off to replace it.
look at the capacitors on the inverter boards and see if they are bulged. I think they are 680uf 35 volts. there are 2 of them in each board
great video. i get no 12v or 5v at the first regulator you're checking. I checked both fuses and they are good.
the vizio logo lights up, but pushing the power button doesn't seem to make any difference. I do have 5 volts at the one fuse.'
Should i replace the first regulator? Thx..
Norcal715, Thanks for the videos! I'm getting voltages of 19.25 and 8 at the fuses on the main board (VU42L FHDTV10a) which throws off my voltages on the power regulators. Should I be looking at the power supply first?
Your video is great!!! I have a similar problem with a Vizio 37 inch, the screen is all withe i have sound but theres no image. What you recommend me to do??
On the remote control hand unit? look for a stuck button or something spilled in the unit on one of the touch pads
the tab is the same as the middle pin, they are connected. The 1st part # you gave shows the normal reg as in the video? cant find any info on the 2nd number.
Hi there, I just got my parts both digi-key and mouser have the same ones. Yippee! They’re the correct parts! I have to say that norcal715 has the best fix for this tv on the internet. He is awesome :0) The fuse is LF 3A, stands for little fuse 3 amp. I bought mine from Mouser, because I had already bought from them before Both companies are excellent. I paid .94 cents and digi-key is 1.15. I bought 5 and 6 regs, which in price are 10 cents apart. So I'll be ready for next time. let you know :)
I want to Thank-you for this video,I have soldered in 1117a as noted,I'm heading in the right direction,when I power up the TV I now get a blue screen,then channel number ,then a quick pic on the TV and then it stops ! On U33 I have 5v input,ctr pin is 3.3 v,and adj pin is 2.05 volts,on U& I have input of 3.3 volts,ctr pin is 1.27 volts,and adj pin is 26.9 mv ???? I have changed the 1117a part 2x....what is my next step to fix this wonderful made product ??? It's fun but never racking ....I solder like a junior high schooler !
is the power supply being turned on? look at the ps on line and see if it changes state? if the ps on command is there then the power supply is at fault. if the ps on command is not there the may be the main board.
Hey Nocal, I believe my main board has gone bad. I am trying to test the same things you have shown, but I don't have power. The power button doesn't power the main board. I have 5VSB to the main board as tested on the first fuse. Most of my regulators still show the 5V to 3.2v drop but several have different voltages or nothing at all. I assume that is because I don't have power. What am I to look for when the power switch doesn't power the mainboard? Vizio vf550m.
Like your video. It's great to see techs are troubleshooting down to the component.
It is a lost art.
Thanks Mr Norcal715. I just had the same TV come in my shop today, and you led me right to the problem. :-)
What a fantastic thing, and service you provide. Here, I have a similar problem as the one you have described. I have a AKA I LCD/TV LCT370IAD My set turns on, and backlights also come on. But no video, Also, I'm able to turn the set off every time. But like I said, I get sound, but no Video. Thank you for any assistants you can offer me. Lee.
What a great video. Thanks for sharing your knowledge! We'll see if I can save this Vizio from the landfill.
Thank you. Very informative video. The solder extractor was also an attention grabber. What kind is it?
Regards,
John
Wow! Nice work. I just wonder how much a repair like this would have cost me.
Hello, Just wondering whether it is possible to use adjustable voltage regulator in place of original voltage regulator which uses a voltage (ie (1.2V, 3V, etc) ???
Thanks
Norcal715-.. 2013 Vizio 701i-a3e powers on with backlight and sound. Also when press buttons it gets just a little brighter then back dim again. How do i know if its tcon or panel problem? I guess it could be main board or cable but most of my research is leading me to tcon. What are your thoughts on this? O ,, it does same with remote and buttons on tv. If you think its tcon board or mainboard problem what are the usual components that go bad so soon. Tv was bought 2 years ago and black friday. Also want to say thanks for your videos. I have learned alot and have kept my 2007 samsung dlp hlt6187sx/xaa running and out of the landfills. Ive replaced caps on both power supplys and the led red plat light from your videos. I want to get the 70" vizio going now. Shame these tvs go out so soon! Thx
hi there love your videos, I have a vivo lcd and on the voltage regulators 1 pin has 5v in the other has 3.3v and the adjust
pin has no reading what do you think. cheers
Thanks much for the video. I had the same symptoms and the same regulator was bad. 50 cents! Thanks again.
This video was very helpful. Thank you. I was experiencing the EXACT same problem, and this video helped me to diagnose it!
use a high power LED flashlight put it right up to the screen and see if there is video, press the menu or something. You can also (in a dark room) shine the light through one of the screw holes in the back of the LCD panel and see if there is video. If there is video then the main board is ok.
Same problem started last week Apr 2016. All regulators appear to be good with 1.2V differential. Last one to the left has 3.2V in, 1.2V out with and 0V +/- on the 3rd term. Where would do you suggest going now?
Also where do you put the black probe on the multimeter when testing the voltage regulators?
where would solder the other end of the wire to? Or does the wire just need to be touching the place where the metal connection point used to be?
first of all, thank you for video.
Let me ask you this, have monitor lcd, work well, only issue is power button, i mean like you hit on this LCD Vizio button to shitch off and wont go off, my monitor have the same issue power button wont torn it off...
Can you say something about it? if not, thanks once again, nice video.
Best Regards
Nice tutorial. I was working on my vizio and when i soldered off the regulator, a metal connection point came off with the adjustment pin. Now the new regulator's adjustment pin wont solder onto anything. I was wondering if there was a way to fix this problem?
Is a gh17 the same? It's what I have from another set. Figured I'd ask. Having exactly the same problem
Hi, yes you can safely remove the back very easily most likely you can use a phillips screwdriver to remove it. There should be screws all around the back of the TV
all white usually indicates no power to the T-CON (main board problem) or a faulty T-CON. Poss a bad LVDS cable also
Hi Norcal715, thank you for your advise. I will for sure get the other solder and try it. I got very discouraged and haven't worked on the TV since my last post. So thank you again.
Would Chip Quick solder be good for removing this voltage regulator on U33? Is it more miss to deal with as far as cleaning off the solder? I just don't want to remove any traces on the board. Thanks for your time.
It should, just make sure all is removed before soldering the new chip on
My question is that if the second fuse only reads 10.8v, should I be focusing on the power supply? Everything else corresponds with your video, as the regulators do regulate the power down consistently, but that second fuse never gets to 12v when its on. it reads zero when plugged in and set off. reading your previous responses i think it it could be power supply, and also to mention the tv backlight doesnt turn on. thanks in advance
Have the same TV with the same problem. Bought a mainboard on ebay. The board layout is the same, but the part number is not. Put the board in. The TV powers on with the power button or the remote, but now the backlight doesn't light. In the sunlight I see a myriad of lines on the LCD. Put the original board back in, I don't, just the exact same problem you had. You think the problem is the board not being the same part number, therefore not the exact same board, or is it something else?
Had issues with Vizio like tv would turn off or doesnt respond to comands, etc. Got a replacement Vizio main board after installing and double checking everything TV won't turn on and Vizio logo won't light up. After unplugging and plugging back in without pressing power button I test two fueses and one shows 5v and the other 12v. I thought 12v should be near 0 until TV is turned on. Any suggestions what I need to check to see if the board can be fixed?
I have the exact same TV and problem, but different root cause apparently. The Vregs have the correct outputs of all that you show. However, you didnt show U9 output. Mine is 1.5V output with 1.3V at the adjustment pin - is it OK? if so, what do you suggest i do next? Thanks!!
Where can I buy a solder sucker like the one you got there? Thanks again, you're awesome!!
Fass Strokaa Solder suckers are expansive unless you buy the type that you heat up with a regular soldering iron and move it quickly and put on the pump type. (Radio Shack sells them.) I use solder braid in most cases.
***** Thank you. I used solder braid and it worked out fine for me.
Wheres the places u can pick up the solder braid? Like walmart or Target? Idk where cause we have no Radio Shack no more. I literally just picked up this same tv but mines a 32" and all black but basically the same and im going to try this diagnoses and see what happens. [Cross fingers] Thanks man for a very informal video.
So, are all 3 regulators supposed to be just about the same voltage? Mine are as follows:
U8
Pin 1 - 4.6
Pin 2 - 3.0
Pin 3 - 1.8
U33
Pin 1 - 4.6
Pin 2 - 2.8
Pin 3 - 1.6
U7
Pin 1 - 2.8
Pin 2 - 1.0
Pin 3 - 0.0
So is it the U33 that is bad? Is it not passing on enough voltage? BTW, I tested the fuses and they are both fine.
First I have to thank you guys for posting these videos. I fixed a 36" LG, replaced 3 capacitors, YAY! GREAT TV... A friend gave me her Vizio VF55OM, does same that LG did, Free BIG TV, yeah baby! Ok, all capacitors look fine everything looks fine but some of the solders look brown tinged. Not burned.. I have No pic, no sound, no blue screen. Plug in turn on, backlight stays orange. Cannot shut off. Could this 'slave' board be the problem.. LOL Im just learning... The slave board that concerns me is the one above the power button on left side of tv.. If you have any suggestions? I would so appreciate it..
Okay... watching this in 2016 after fixing U33 or whatever thanks to this video, now reading all the comments that report the same regulator as the culprit. Too much of a coincidence. Planned obsolesce at work.
Hi @norcal715 ,How do you know at what voltages is each regulator supposed to be at, did you learn that in school or from a manual or something?
What type of soldering gun did you use? because mine was not hot enough to even melt the solder to the point where i could slide it off. i ended up breaking the board and buying a new one. But this video did help me solve my issue i had the same TV set as in your video and mine had the exact same problem. Same regulator and everything i just couldnt get it off the damn board.
What is your shop called? is there any contact info or email to reach u with questions?
I have the same TV VX37L HDTV10A with the same problem . Changed the main board before I saw your video and it did not change anything. After watching your video and checking the voltage, the F2 fuse reads 12V not 5V and the F1 fuse reads 24V not 10V. So I changed out the power board thinking there is a problem with the output. Still no change. Also at the power board, taking a voltage reading where the LVDS cable connects I get a reading of 24V. Backlights work fine just black screen. Any ideas??
Hey norcal, thanks for putting up this video. I was wondering if you can help me troubleshoot a problem I've been having? I have a Vizio GV46L way back from 2007. It was working great until I had the power go out in my house. My TV acts the same as the TV in this video, but with mine all the buttons on the side of the TV work with the exception of the input button. It also wont respond to the remote. Do you think it could be the main board or something else? Thanks!