Hi, I am working on my 42 inch LCD TV. My daughter plugged a computer into one of the USB ports and the TV shut off. It will not power on at all now no backlight, no amber light wont do anything. I replaced the power supply thinking this was the issue without properly troubleshooting my mistake. The power supply did not fix the issue. I found your site and I have performed some troubleshooting. I have the 5V SB but I am not getting the 12V or 24V from the power supply the fuse is good on the PS. I unplugged the power supply from the inverter board and still no 12V or 24V. I checked the fuses on the main board and I am getting 5V. I checked U33 and I am not getting anything on Pin 1 or Pin 2. I cannot read any of the voltages on any of the regulators. I was going to just buy a new main board but would like to try and repair this myself it sounds like from what I have read here it that the main board could definately be the issue. I would appreciate if I could get some feedback on what to further check and how. I will get some picutres of the main if you need them. I am exctied to get this bab
y running again with component level troubleshooting. Any suggestions and feedback would be much appriciatted.
y running again with component level troubleshooting. Any suggestions and feedback would be much appriciatted.
Comment