If you have no image on your TV or monitor, but the backlight and audio are working, and replacing the T-con board did not fix the issue, there are a few other possible causes that you can investigate:
# Faulty main board: The main board is responsible for processing and displaying the image on your TV or monitor. If the main board is faulty or damaged, it can cause the image to not appear. You may want to consider replacing the main board if you have already ruled out the T-con board as the cause of the problem.
# Loose or damaged cables: Check all cables connected to the TV or monitor to make sure they are secure and undamaged. Loose or damaged cables can cause image issues or prevent the image from appearing altogether.
# Bad panel: If the main board and T-con board are working properly, but the image is still not appearing, the issue may be with the panel itself. A bad panel can cause image issues, including no image at all. Unfortunately, a bad panel is usually not repairable and requires a full panel replacement, which can be expensive.
# Firmware issue: In some cases, a firmware issue may be causing the problem. You can try updating the firmware on your TV or monitor to see if it resolves the issue. Refer to the manufacturer's instructions or website for details on how to update the firmware.
If none of these steps resolve the issue, it may be best to contact the manufacturer's support or a professional technician for further diagnosis and repair.
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