Just before Christmas and my LG 42PA4500 plasma TV has stopped working! My kids are not happy and I am desperately trying to fix it so would appreciate any comments and support. I am new to trying to fix TV's and have been on google reading a lot and trying a few things but am still no further forward.
Here is what happened – The TV was on and all ok and then suddenly switched off on its own. It would not switch back on so I unplugged it for 10 mins and then plugged it back in and it started as normal and all was ok until it did the same thing 5 mins later and has not switched on since.
Current status – When you plug the TV in, the screen stays black but lights light slightly like a back light has come on. You can hear the YSUS board buzzing away. The standby indicator on the front of the TV is solid red and does not change. Pressing the power button does nothing.
What I have tried so far –
1. Have disconnected the YSUS board and tried to start the TV but nothing.
2. Have disconnected the ZSUS board and tried to start the TV but nothing.
3. Have checked all the connections between the boards and all are ok.
4. Have checked all the boards for swollen and leaking capacitors and all are ok.
5. Have checked the standby, Va and Vs voltages out of the power supply and all are ok and match what is written on the case.
6. Have checked each panel is receiving the correct voltage on each connection and all is ok.
7. Have checked both sides of each board for obvious signs of bad connections and all appear ok.
8. Have checked the capacitors with a multi-meter on ohm setting and all are showing a gradually increasing resistance with time which I read means they are ok.
There is a solid red light on the mainboard, a flashing green light on the control board and the YSUS is buzzing away.
The only odd thing I have noticed is that the standby indicator on the front of the TV is solid red indicating it is stuck in standby but the YSUS is buzzing away. When it was working and in standby, the YSUS would normally go quiet and it should all be powered down.
Has anyone come across this before? Or, any ideas?
Here is what happened – The TV was on and all ok and then suddenly switched off on its own. It would not switch back on so I unplugged it for 10 mins and then plugged it back in and it started as normal and all was ok until it did the same thing 5 mins later and has not switched on since.
Current status – When you plug the TV in, the screen stays black but lights light slightly like a back light has come on. You can hear the YSUS board buzzing away. The standby indicator on the front of the TV is solid red and does not change. Pressing the power button does nothing.
What I have tried so far –
1. Have disconnected the YSUS board and tried to start the TV but nothing.
2. Have disconnected the ZSUS board and tried to start the TV but nothing.
3. Have checked all the connections between the boards and all are ok.
4. Have checked all the boards for swollen and leaking capacitors and all are ok.
5. Have checked the standby, Va and Vs voltages out of the power supply and all are ok and match what is written on the case.
6. Have checked each panel is receiving the correct voltage on each connection and all is ok.
7. Have checked both sides of each board for obvious signs of bad connections and all appear ok.
8. Have checked the capacitors with a multi-meter on ohm setting and all are showing a gradually increasing resistance with time which I read means they are ok.
There is a solid red light on the mainboard, a flashing green light on the control board and the YSUS is buzzing away.
The only odd thing I have noticed is that the standby indicator on the front of the TV is solid red indicating it is stuck in standby but the YSUS is buzzing away. When it was working and in standby, the YSUS would normally go quiet and it should all be powered down.
Has anyone come across this before? Or, any ideas?
((
Comment