I'm looking to repair a tv someone threw out. I learned that it wouldn't turn on when plugged in. No standby light, no backlight. I opened it up and started to fiddle. When I disconnected the plug (as pictured) with the power supply, the backlight of the tv would come on and stay on. When I reconnected, it would turn back off. I just want to see if anyone can confirm if this is a main board isssue?
