Hitatchi model P50T501. I have had the tv about4 months and everything was great. two days ago a source was shut off but the tv wasn't so it went into power save mode(orange light). When I tried to turn it back on it wouldn't do anything so i pulled the power plug out waited a bit and tried again, still nothing. If I hold the power button in for a bout 8 seconds it will go to what should be "on" (blue light)but it dosen't show anything(no picture, sound, won't go into menu, nothing) it also will not turn back off unless i hold the power button in again. With no source input it should go into power save mode but it won't even do that. Any assistance would be appreciated.
A fuse has probably blown inside the TV, I had something similar with a panasonic TV a number of years ago. Open the back up and use a continuity tester across your fuses till you find the right one...................dont forget to unplug it first !!
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When the light blinks 4 times it means you can possibly have 4 problems with your plasma.
3. Power Supply
4. Sdr U or D
A good way to determine if you can fix this problem yourself is if you can build a PC. If you cant this can cost you upwards of 600$ to fix.
First get a flat area and lay a soft blanket down and lay your TV down so the back is up. Then goto your PC and goto Google and type "P50T501 Service Manual .PDF" you can buy it or if you look hard enough you can get it for free. Next in the service manual it will have a diagram of the Circuit Boards and their locations. Take the back off your Plasma and check the 4 boards. Look for burn marks, cracks, smoke mark. Take your time and look closely. When you find the broken boards unplug it and take the part number and find the replacement online. Plug it in and you should be good to go.
When i had 4 blinking lights i had to change my SDR U and D boards. They cost 100's a piece for Refurbished boards. Keep in mind im a contractor not a techno geek, and i was able to diagnose and fix my problem rather easy.
you might try checking the sap (secondary audio programming) option in your tv if it has one make sure it is turned off. if it is off or does not have that option you will most likely have to take it to a repair shop. i would not try to fix it my self as you will do more harm than good.
The problem could be the power supply, the flyback trasformer or simply a bad connection. A repair cost for this TV set could run any where from 75 bucks all the way up to 225 or so, depending on the problem. Good Luck