Chosen Solution
Tried unplugging & using a different socket Changed remote batteries. Reset remote. Tested remote and it is working (IR flashes when press) There is power to the TV. The red standby light is on still, not flashing. But TV will not turn on or show any picture. Tried controlling from TV also. Red light flashes when press buttons but no picture or sound no external devices. please help - I’m working from home & my kids are climbing the walls on Inset day!!
Hi @sunisshining Try the following to see if the power board voltage supplies are OK. Disconnect the power from the TV and then remove the back cover from the TV. Disconnect the mainboard - power board cable at the power board. Reconnect the power to the TV. The TV screen backlights should turn on full intensity and stay on. There will be no picture or audio as the mainboard is disconnected. If the backlights don’t turn on or if they blink, then there is a problem with the power board or the backlights or both. If the backlights stay on, then measure the voltages at the cable connector on the power board where the mainboard cable was connected. Their values should be shown in a table printed on the power board close to the connector. If the voltages are OK then most likely there is a problem with the mainboard. If the voltages are not OK then there is a problem with the power board Be safety aware, even though you’re testing for low DC voltages there is exposed lethal AC power on the power board near to where you will be testing. If you don’t know how to safely test when AC voltages are present then don’t do it! Contact a reputable, professional TV repair service and ask for a quote
