Re: Olevia 242FHD-T11 no picture, but has sound
Every process on this TV is controlled by the main board. The way it is set up the power supply sends voltages to the main board, the main board sends the voltage to the T-con and the T-con then sends the signal to the inverters to turn on the backlights. The backlights on these TVs will not come on unless the T-con receives the signal from the main board to turn on. It is possible that the T-con could be holding everything back but the only way to know would be to replace it with a working one. On the TV I fixed the problem was very similar, if not the same, to your first set of circumstances. I checked all voltages on the power supply and they were fine. The inverters checked fine so that left me with the main board as the culprit. I checked my board by heating it with a heat gun for a few seconds and then trying to power it on. It powered on and everything worked great. At this point, I thought is was a capacitor problem and recapped the board but still had the same problem. Rather than chase the problem I decided to buy a new main board and the TV has been working fine since. Based on the info I found this seemed to be a very common problem on Olevia TVs.
Every process on this TV is controlled by the main board. The way it is set up the power supply sends voltages to the main board, the main board sends the voltage to the T-con and the T-con then sends the signal to the inverters to turn on the backlights. The backlights on these TVs will not come on unless the T-con receives the signal from the main board to turn on. It is possible that the T-con could be holding everything back but the only way to know would be to replace it with a working one. On the TV I fixed the problem was very similar, if not the same, to your first set of circumstances. I checked all voltages on the power supply and they were fine. The inverters checked fine so that left me with the main board as the culprit. I checked my board by heating it with a heat gun for a few seconds and then trying to power it on. It powered on and everything worked great. At this point, I thought is was a capacitor problem and recapped the board but still had the same problem. Rather than chase the problem I decided to buy a new main board and the TV has been working fine since. Based on the info I found this seemed to be a very common problem on Olevia TVs.
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