I hijacked an older forum hoping someone had a shortcut to help me find what may be wrong with this set. Decided it would be best to just start my own thread and hopefully with your help we can get this tv up and running so I can give it to my grandparents.
Background: TV appears to have taken a surge from the AC coming into the unit. Other than some discoloration on the chassis and slight black discoloration around the AC terminations everything seems to look good appearance wise. No buldged caps, no burnt fuses, no popped resistors, etc.
After plugging the TV in I found that it would not attempt to power up. I checked the main fuse on the ps and it is good. I checked fuses f1 and f2 on the main board and both test fine as well but f2 does not have the 5v input or output that it is supposed to have from the ps.
Any ideas where to start? I have been trying to follow the service manual which listed checking f2 for 5v. Then asked if J1 connector is good. There is no dc voltage present on the J1 connector but the connector appears to be okay. Next step is DC-to-DC. Not sure what this implies. I did test the bridge rectifier and it tests fine. Last step is to check U8 pin 2 for 3.3v, which also has 0v. Of course this makes sense as I don't have any dc present leaving the ps.
Background: TV appears to have taken a surge from the AC coming into the unit. Other than some discoloration on the chassis and slight black discoloration around the AC terminations everything seems to look good appearance wise. No buldged caps, no burnt fuses, no popped resistors, etc.
After plugging the TV in I found that it would not attempt to power up. I checked the main fuse on the ps and it is good. I checked fuses f1 and f2 on the main board and both test fine as well but f2 does not have the 5v input or output that it is supposed to have from the ps.
Any ideas where to start? I have been trying to follow the service manual which listed checking f2 for 5v. Then asked if J1 connector is good. There is no dc voltage present on the J1 connector but the connector appears to be okay. Next step is DC-to-DC. Not sure what this implies. I did test the bridge rectifier and it tests fine. Last step is to check U8 pin 2 for 3.3v, which also has 0v. Of course this makes sense as I don't have any dc present leaving the ps.
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