Samsung qled tv Q60t
A Samsung tv was working just fine when suddenly it turned off and it won't turn back on(list of stuff I have tried in the end).
When the TV is connected to electricity it does turn on the red light on the bottom of the TV and it's consistently light up red except when pushing the power button with the remote or the power button on the TV itself.
At this point I think the problem is in the power supply board but I'm not sure if it's the power supply or the main board. I would appreciate any feedback. Or I could provide any extra information if needed.
Name of the parts: Mainboard: BN94-15232C Power supply board: BN4401058A L55E7-T
I have tried:
- disconnecting the power cable
- using new power cable
- turning it on with the button
- changing the batteries to the remote
- disconnecting every HDMI cable
- Holding the power button while the TV is disconnected
- Leaving it off for a day
Update:
- Check if on mainboard power cable is 12v.
1)I have tried to do that and it giving 16.4 v and some were under 6v. I checked if there was 12v going to the main board is that right?
- Disconnect mainboard power cable, lcd panel backlight turn on or not ?
2)disconnecting the main board and turning the TV on made the TV back lights turn on they look healthy. Note that nothing was connected except the the power board. When disconnecting the back light only and trying to turn it on nothing change so it did the same as before.
can add that know how to solder and use multi meter if needed. do have a different motherboard and power supply board for another Samsung tv to salvage parts of if needed. I might add after opening the TV connecting it to the power there is some sound on the power delevery system