Re: Vizio SV472XVT no video, but have sound
Hi,
Sorry, I never checked the voltage. Just replaced the tcon board with one I bought off eBay. Still working great.
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Re: Vizio SV472XVT no video, but have sound
Bud,
Many, many thanks for the help in diagnosing the problem to the tcon board. installed the replacement board today, and the tv works perfectly.
many thanks for all the help.
Janis
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Re: Vizio SV472XVT no video, but have sound
Bud,
fuse on the t-con board tested ok at 11.8 on both ends of the fuse.
should we also test the voltage regulator on the t-con board or do something else to see if it needs to be replaced
tx, Janis
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Re: Vizio SV472XVT no video, but have sound
ok will do and will let you know,
thanks!
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Re: Vizio SV472XVT no video, but have sound
Bud,
many thx. i'll try ordering a board.
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Re: Vizio SV472XVT no video, but have sound
Bud.
many thanks for the patience and advice. we went through and re-tested all fuses and voltage regulators on the main board, as we suspected we may have had only standby power on yesterday during some of our tests. The following readings are with the TV fully powered on, and we did see the blue glow of the backlight in the back of the TV, though the screen is still black in front when fully powered up.
Our validated results are as follows:
U5 L501 G1117
pin 1 2.069 (adj)
...Last edited by mjastuart; 08-04-2013, 05:50 PM.
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Re: Vizio SV472XVT no video, but have sound
Bud,
many thanks.
and any suggestions on what I should check next? should i test the output from the power supply board?
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Vizio SV472XVT no video, but have sound
Hi,
thanks in advance for your help/advice.
We can power up/force power up the PC and can get sound, but no picture so we are assuming a problem with the backlight. we cannot get to bluescreen or see the menu and when we hook it up to cable the screen is dark gray.
in looking at the other postings and a number of videos on this topic, we started checking out the fuses and the voltage regulators on the main circuit board.
Fuse F4 was 11.90 and 11.88
Fuse F10 was 5.143 and 5.128
Fuse F13 was 5.145 and 5.141
we then...
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Re: New Members - please post your introductions here
Hi,
I have found this community to be a treasure trove of information, that I hope will help me repair my LCD TV. I am an electronics neophyte, but have a good friend who is an EE who is standing by to help if it becomes too complicated for me.
JCR
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