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1 Tv Has back light but no picture
I have a Vizio 55in 4K TV model number m55 - C2 the problem is it has no picture but does have backlight and sound. When powering on the logo flashes for a Split Second I have tested all voltages they're all good but the voltages from the output on the t-con board are not present or are very low at the ribbon cable connector test points I have replaced mainboard bord and t-con bord. Still having same problem please can you help me figure this one out really would like to get this TV up and live again thanks.
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4 Comments
The voltage on the power supply board are all good. But I will do sum more probing around and see if there are voltage drops while turning the TV on. And other combination of things
by Leo Kersting
@lenke those repairs can be tricky since at this time you really won't know which board is failing and either not receiving and sending the power communication. Backlight without image is usually the main board. However, if the power board does not send the right power signal to that board it would become the issue.
by oldturkey03
One of the LCD driver boards does have a eeprom chip on it. Problem might have to do something with the eeprom chip has to be reflashed.
Do you think that is fixable?
I have troubleshooted everything else and I only can narrow it down to that.
Do you have any suggestions or thoughts on that?
Thanks
by Leo Kersting
@lenke "the LCD driver boards does have a eeprom chip on it." post soem images so we can see what you see. Use this guide Adding images to an existing question for that. Possible that it could be an EEPROM error but unlikely. If you cannot see the display, re-flashing maybe hard to do.
by oldturkey03