More lightning damage

[rca2000]

This means that the standby supply is at least working to a degree. It may not be just right...but it IS working.

NOW--what you need to look for it: are you getting a "power on" command to the PS board, from the signal board ?? This will appear ONLY when you press the power button, on the set or remote. It should NOT be there when the set is off.

Hook up the PS board, and monitor the power on line. If it is at 3V. or so before you hit the power button, see if it "changes' to a low, near 0. If it is already 0, see if it goes to about 3 volts. One way or another it MUST see a BIG change--in order to turn the "run supply" on.

If you get the PS on command--and do NOT see the other voltages at some other pins, such as maybe 12 volts, and such..THEN it means that the run portion of the power supply has taken a hit. I would suspect those FETS's on that sink, down the middle of the board are shorted and that white fuse resistor near them is then open. ALSO--if this is the case--I think there will be a chip near the middle of the board on the other side--that is the SMPS controller. It may also be bad.

IF...you are getting a good on command--then at least a PART Of your signal board is good. I worked on a set like this recently. It had a dead standby chip (that little one on the right side of the board with the weird pin-out.) .AND a dead-shorted BL inverter board. After I got the standby supply running..I THOUGHT I had a bad signal board, since nothing would come on. BUT...I found that my on command was fine from the signal board, and when I unplugged that cable from the BL inverter--the set would try to come on--even make a "chime" in the speakers--but with no BL--it shut down. I was able to get a good inverter board for a very low price--and saved the repair for the customer. SO...If you get a good on command...unplug that cable to the BL inverter...(on the OTHER side of the PS the one NOT gong to the signal board) and try again. if the set then tries to come on...you likely have a shorted inverter. Mine had a dead short on the 24 volt line--severly loading the run supply and causing shutdown.

But..IF you have a good 3 volt line and NO change in the power on command...and after you unplug ALL other possible problems, (such as the panel and T-con) , you may INDEED have a bad signal board.. But try what I said first. You may just have a dead Power supply, and it might can be foxed--or perhaps ordrerd on ebay.