Chosen Solution
Hi everyone, I have a 60” Samsung plasma TV. (PA60H5000AR) It stopped working for no apparent reason after approx. 2 years. When I turn it ON, the red LED blinks with a repeated pattern, but I could not find any info on what these blinking patterns mean. There is also a very faint clicking sound coming from the power supply unit every few seconds. (it sounds like coming from a relay). I have checked all the boards and their components/connectors for any signs of damage, but I found none. All the voltages are spot on when the unit tries to turn itself ON as well as on stand-by mode. (voltage values are from the label affixed at the back of the panel and connector labels on the PCB boards) I have tried to isolate the problem by disconnecting boards one-by-one but could not figure out any meaningful results as my knowledge is very limited on this subject. Depending on the board disconnected, the red power LED would blink in a different pattern. Looks like many of the diagnosis methods posted here for this type of issues are meant for LCD or LED TVs, but mine is a plasma TV. I would be grateful if anyone could point me in the right direction for the proper diagnosis of this problem. I have the video of the blinking LEDs and the pictures of all the boards, and I can provide them if needed. Thanks in advance! Edit: added videos and photos
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Yellow rectangle is T-Con/Main-board connection. Connections marked as red colour “X” do not change the results regardless of if they are connected or not. Update (07/30/2020) I did some further testing and found out that disconnecting the cable between the T-Con board and the Mainboard makes a difference. When this cable is disconnected, blinking of the LED stops and the LED behaves like how it would do when it was operating normally, except that the screen is still dead and there is no sound. Update: Sound is ok. Apparently I didn’t test it correctly before. Connecting or disconnecting all other cable connections to the T-Con board does not change the results. Already ordered a T-Con board and waiting for its arrival. Any ideas if other boards could still be the cause of this problem?
with the testing done and results you posted: this looks like it is going to come down to either the tcon board or the panel display. if the tcon you order matches the one you took out and it does not fix the issue, all that would leave is the panel tabs and buffer boards. this is based on you having no backlight issue and regular logic function/sound on your main board. backlight verification: unplug the main board from the power supply board. backlights should come on and set stay on without cycling. mainboard verification: unplug lvds cable leading to tcon board and verify that the set turns on with sound and logic function via remote/ onboard power buttons. tcon test: top of tcon where lvds cable plugs in, there is a fuse…labeled f***… this should have a steady 12 v. if this does not have 12 volts coming in, then the issue may be with the lvds cable , power supply, or main board.
