I have a VW42LHDTV10A Vizio, no picture no sound, no response from the remote or the bottons on the set. Have to unplug to turn off, My back lights are coming on and I get a white screen now that I replaced Two voltage regulators U7 and U33, Both fuses F1 & F2 are good. I am safe in thinking it is just a main board problem or could the inverters be bad. Can't find a service manual for it so I don't know how to test the inverters. Can anyone help??
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Re: No video no sound
Hi you have been a member for some time so should know the drill.
See "Search" above - Type VW42LHDTV10A into the search and read some/all of the previous posts. You will see that pictures are required.
One of the posts at least says there is a schematic on electrotanya.
And this one (another set) https://www.badcaps.net/forum/showthread.php?t=12954 has lots of good ideas.
You can also search for vizio inverter or test inverter and a load of posts will come up which should help you. If not then make a second post advising all the steps you have taken include pictures of your boards and someone might then have enough info about your problem to assist.
I am safe in thinking it is just a main board problem or could the inverters be bad.
A, possibly B, unlikely - The inverters power the back lights so if they are on and remain on then it implies the inverters are ok.Last edited by selldoor; 02-06-2012, 05:46 AM.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740 -
Re: No video no sound
I am so ashamed,,,,, I thought about the search after I posted, and did find lots of good things to read that were helpful. I hope you can someday forgive me
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Hi all,
Ok so I have this beautiful un55h8000 samsung tv with sound but no video nor backlight. When turning the set on the red light blinks 5 times.
The screen shows no damage and backlight turns on when I disconnect the power supply from the main board. The tcon board only has 2 out of 3 leds on.
I came across this page and followed the different steps: https://techhometravel.com/samsung-u...ight-no-video/
- Unplugging the main board cable at the power supply >>> backlights came on.
- BLU_ON signal from the
- Unplugging the main board cable at the power supply >>> backlights came on.
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Good day ladies and gentleman!
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