Chosen Solution
Hi. My QN55Q6 turned on the other day, went pop, then no picture at all. No backlight. Replaced power supply board, backlight came on just fine, but the picture is nothing but colored lines that move. There is no physical damage to the LCD panel that I can see and was working fine before the pop. Remote not working to power tv on/off either. Any ideas? Could it be the cable between power supply and main board? Main board is so expensive, I would just replace tv.
If something went pop, that sounds like some sort of catastrophic failure. If it was a noticeable POP, usually that’s the sort of damage you would be able to see. Did the original power supply board have any components that looked like they had failed? The other thing to keep in mind is that if it was the power supply board that was the initial cause of the issue, those sorts of things can take other components out with them depending on the exact nature of the failure. So even if the power supply was the initial issue, it may have damaged the system board on the way out. It sounds like you’re getting different results than before you replaced the Power supply board, and I am not intimately familiar with TV repair, but this still seems like more than just a cable issue.
