Mitsubishi WD-62825 Vertical Hold Issues

A completely white screen with white vertical lines on your Mitsubishi WD 77731 TV can be an indication of several possible issues. Here are some potential causes:

1. Faulty T-Con board: The T-Con board is responsible for processing the image signal and distributing it to the screen. If the T-Con board is faulty, it can cause the white screen and vertical lines issue.
2. Loose or damaged cable connections: Loose or damaged cable connections can interfere with the transmission of the image signal, causing the white screen and vertical lines issue.
3. Failed backlight: The backlight of the TV illuminates the screen from behind. If the backlight has failed, it can cause the screen to appear white.
4. Damaged LCD panel: The LCD panel is the display screen of the TV. If the panel is damaged, it can cause the white screen and vertical lines issue.

To troubleshoot the issue, you can try the following steps:

1. Check the cable connections: Make sure that all cables connecting the TV to the source device (such as a cable box or gaming console) are properly connected and undamaged.
2. Power cycle the TV: Turn off the TV and unplug it from the power source. Wait for a few minutes, then plug it back in and turn it on.
3. Check the T-Con board: If the T-Con board is faulty, it may need to be replaced. You can check for any visible signs of damage or contact a professional to diagnose and replace the board if needed.
4. Check the backlight: If the backlight has failed, it may need to be replaced. You can shine a flashlight on the screen to see if there is any image visible, which would indicate a failed backlight.
5. Contact a professional: If none of the above steps resolves the issue, you may need to contact a professional for further diagnosis and repair.

If your Mitsubishi WD-77731 TV screen has turned completely white with white vertical lines, it is possible that there may be a fault in the display panel or the video processing circuitry of the TV. This could be caused by a variety of issues, including a faulty LCD driver board, a loose or damaged video cable, or a problem with the TV's power supply.
Here are some troubleshooting steps you can try to determine the cause of the problem:

1. Check the video input: Ensure that the video input to the TV is working properly by connecting a different video source, such as a DVD player or game console, to the TV.
2. Check the video cables: Inspect the video cables that connect your video source to the TV for any damage or loose connections. If you find any damage, replace the cable.
3. Power cycle the TV: Turn off the TV and unplug it from the power outlet for 1-2 minutes. Then, plug the TV back in and turn it on to see if the issue persists.
4. Check for firmware updates: Check the Mitsubishi website to see if there are any available firmware updates for your TV. Updating the firmware may help to resolve any software-related issues.

If none of these steps resolve the issue, it is recommended that you contact a professional TV repair service to diagnose and fix the problem.

That answer I agree makes no sense.

Most of these sets have NO vertical hold and if did it will not cause the lines.

A brief educated guess:

Set has a main board that communicates and controls the screen--tests for that are not simple (checking waveforms with a scope and signal generator).

The model indicated here is a DLP that uses a lamp (let me know if model listed is not the one you have).

In DLP sets aside from main/digital board you also have a optical light engine---it processes all signal in and out to the screen.

Optical engines do fail and cause some simple and some complicated picture issues.

Some will even cause the set to "lock up" with a picture or strange looking screen---clue to this is you have to shut the set off by pulling the power cord.

The set may be old enough they do not really want to help you or even talk about it.

You will have to search for a TV repair shop, and see if they have another 45" Mitsubishi TV of the same model, or close. You may be able to get a replacement screen from salvage. As for the vertical hold, in some cases you may believe the vertical IC is at fault (we will come back to this), may be not. The first suspicion is in the signal board. The signal board is the board with all the RCA jacks and RF connections. Pull this board out and replace Capacitor (location C2V29) this is a 16 volt 22Mf capacitor. Also replace C2P05 which is a 16 volt 100 Mf cap. This will correct your vertical problem. If you can find an ESR meter, I would certainly check all the capacitors in the signal board. You will find several weak capacitors to replace. The two already mentioned are extremely weak or bad. As for the other board (power supply) you may have to resolder the pins on the vertical IC. It will be located on the corner of the board. I do not remember the location. It is mounted on a heat sink, the vertical IC will have a number such as LA78XX. (LA7838, not sure). Resolder the pins on this IC and check the capacitors in and near this IC. I have not received much problems with this power supply. As always, inspect both boards for bad solder grounds and resolder as necessary! Thanks for asking and show all hands of support!

Common Repairs
For the following models: WD-52631, WD-57731, WD-65731, WD-Y57, WD-Y65, WD-57732, WD-65732, WD-57831, WD-65831, the most common repair problem stems from television shutting off almost immediately after it has been turned on accompanied by the message, "TV will shut down in a few seconds. Please check if the air flow is blocked." According to the Mitsubishi website, this issue is caused by a loose connection as a result of a faulty thermal sensor. For models: WD-73727, WD-73827, WD-73927, WD-73732, WD-7383, the most encountered repair problem has been in relation to the optical engine. Another common situation consumers have encountered is failure of the TV to turn on along with unceasing flashing of the green power light. The solution for this problem, caused by the DM board, will vary by repairman. Consumers have also encountered issues with moving vertical or horizontal lines appearing on the screen which can either be due to problems with the capacitor, light engine, or formatter board. Make sure all bad caps are changed.

Take that mother back to the store and tell them to quit dropping there Televisions i am serious about that statment. There is a resister that came loose inside the TV it needs to be repaired,

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

not sure what light picture has to do with problem  but no there is no  vertical hold control  prob bad electrolytics invertical feed back circuit, need tech..

I have the same problem with my tv, my tv tech said mitsubishi knows of the problem and knows how to fix it, but it would cost me 700.00 plus his labor to take out the chassis and send it in to mitsubishi, plus I would be without a tv for up to a month. this is b.s.

sounds like dm module
http://hdtvoice.com/voice/showthread.php?t=32186

on mitsubishi just replace the caps that are near the vertical ic this will fix the problem good luck