Hello Everyone and thank-you for your help.
I've been straining my creativity to the limits to figure out what went wrong with my tv.
I've searched 20+ pages of posts and didn't find anyone with a problem exactly like mine so I'm posting here in hopes I'm not beating a dead horse.
My TC-P60ST30 has been a faithful tv for 2 years now. I had no problems and enjoyed the quality picture. 2 weeks after my extended warranty was over the set started to develop a buzzing noise which gradually escalated into a buzz so loud I could hear it from any room in the house and watching the tv was impossible if I also wanted to listen to people talk.
My dad is an electronics technician. I grew up playing around his shop. I think I recognize the sound of a failing power supply, but the internets say that it's just a loose screw problem, and I'm happy to hope it's that simple.
I removed the back panel and tried tightening every screw there was to tighten. Only issue....they were all tight. Next step I figured I'd remove the power supply boards and see if something failed. After a careful inspection (finding no issues with sight or smell) I put the entire thing back together and tried turning on the panel.
It would not power on. :( No red light....no noise. Nothing.
After re-examining it I found I forgot to re-connect the small 5pin (P63-P64) and 6pin (P61-P62) wires to their connectors. Oh well...no biggie. Plugged those in. TV still won't power on.
I've tried everything I could to deduce what was happening. I would hear the faintest of (one) clicking noise upon power plug connection; but no other signs of life.
I dug out the multimeter and tested the boards. Power supply board 5 gave power to board 3 and after that I don't know where it went. The power button won't do anything. I even tried connecting the two wires that lead to the power button. No go.
All sleep deprived my probes slipped from my hands on my 3rd or 4th read of the AC current and BEHOLD!!! There is light and signs of life....for half a second as I swear and realize I just shorted out the input panel.
I buy a new panel on ebay. In fact I buy all 3 of the power supply boards. Plug/screw them all in and hope for the best. No response from the tv.
I'm about at my wit's end. Do I suppose the A/V board (with all the hdmi and A/V plugs) is bad? I read somewhere that it could be the cause of my problem. There's several on ebay....but is it really my problem? Can I save this tv???
edit: apologies if I should have kept this to a specific thread. I didn't mean to start a new thread; just a new post in an existing thread.