Hello all,
I got this beauty of a 65" Android Smart TV from a roommate whose boss through it out because it didn't work. I've fixed a few TVs before, but was being stupid on this one:
Original issue:
TV powered down after a minute or so, but picture was fine.
Tried replacing main board, which didn't work. I should have just replaced the AC Power board.
Months later, I replaced the power board, so I can see the screen. I lost / threw out my original main board, and there is now what I believe to be a defective main board in the TV. My symptoms are, when I power up the TV, there are changing test patterns. White, Blue, black, vertical rainbow stripes, horizontal rainbow stripes. I have sound that sounds like it is in the Android TV menu, sort of an ethereal ohm-ing.
To my understanding, the test pattern comes from the TCON board, so the TCON board is good as the picture looks flawless. I think the lack of picture comes from the main board. I've tried a firmware update via USB. I know it went through because of a flashing status light going for about 10 minutes, and then the TV reboots, back to test pattern.
So this seems like it is definitely the mainboard, or possibly bad lvds cables.
Curious what these test patterns mean in terms of troubleshooting hardware.
A main board is 100+ dollars, what are some good tips on ruling out lvds cables? Has anyone had experience with these smart TVs in terms of buying a new main board on a place like ebay? Is firmware update necessary.
It seems that the component(s) of the mainboard that send video are defective. I've searched around the forum for issues similar to mine where people are seeing a test pattern, but didn't find much.
I know I've rambled but anyone with resources on this specific tv or other Sony Android TVs would be super helpful. These are mini computers.
Thanks Everyone in advance
I got this beauty of a 65" Android Smart TV from a roommate whose boss through it out because it didn't work. I've fixed a few TVs before, but was being stupid on this one:
Original issue:
TV powered down after a minute or so, but picture was fine.
Tried replacing main board, which didn't work. I should have just replaced the AC Power board.
Months later, I replaced the power board, so I can see the screen. I lost / threw out my original main board, and there is now what I believe to be a defective main board in the TV. My symptoms are, when I power up the TV, there are changing test patterns. White, Blue, black, vertical rainbow stripes, horizontal rainbow stripes. I have sound that sounds like it is in the Android TV menu, sort of an ethereal ohm-ing.
To my understanding, the test pattern comes from the TCON board, so the TCON board is good as the picture looks flawless. I think the lack of picture comes from the main board. I've tried a firmware update via USB. I know it went through because of a flashing status light going for about 10 minutes, and then the TV reboots, back to test pattern.
So this seems like it is definitely the mainboard, or possibly bad lvds cables.
Curious what these test patterns mean in terms of troubleshooting hardware.
A main board is 100+ dollars, what are some good tips on ruling out lvds cables? Has anyone had experience with these smart TVs in terms of buying a new main board on a place like ebay? Is firmware update necessary.
It seems that the component(s) of the mainboard that send video are defective. I've searched around the forum for issues similar to mine where people are seeing a test pattern, but didn't find much.
I know I've rambled but anyone with resources on this specific tv or other Sony Android TVs would be super helpful. These are mini computers.
Thanks Everyone in advance
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