Lg 50' plasma clicks but wont turn on

Electro Med Services

• 6694 Answers
• Posted on Jan 18, 2011

SOURCE: 50 in lg plasma wont turn on just clicks

hi,
you have to check the power supply first.

As u mentioned about the click sound, the 5v standby supply is ok. The click sound you hear is from the standby relay.
you have to check the other power supplies in the SMPS (switch mode power supply board) board.
first of all check the standby supply 5v on tne pin of connector P800. check the voltage at this point in standby condition and at the time of power on. it should stay at 5v. if it reduces the you have to check the components related with standby SMPS transformer T501.

If the 5v volt is ok the u have to check the 3.4 v at the pin 1 and 2 of connector P802, at the time of power on. if it is missing then check the components related to T112 ,also check the following voltages at the same power on condition.

19v at Pin 1and 2 of P803
6v at the pin 5 and 6 of P802
12v at the pin 9and 10 of P802

check these to verify your tv's power supply
proper care should be taken while working with power supply, because there is risk of getting electric shock.
if you need any more assistance fell free to contact me through fixya.
I have with me its field service manual ( does not have any schematics) if u need that i will sent it to you, if u give me your email id through fixya.
ok

SOURCE: LG 42PC3D-UE Turning on, clicking, then turning off & repeat

replace the power supply it is a simple fix if you can hear the relays click 2 times or more replace the power supply board you can order them from UNION Electronics ask for kyle when you call ,,if the power supply isnt the problem then it will be the control board located below the power supply board I have repaired a few of these the voltages are marked on the power sullpy board conections be careful there is a VERY HIGH AND DANGEROUS VOLTAGE FEEDING THE X AND Z BOARDS DONT REMOVE THIS WITH SET PLUGED IN IT IS HOT ENOUGH TO BURN A HOLE IN YOUR SKIN AND EVEN DO MORE DAMAGE TO YOU if your not sure what to do Call LG they have a good support theam there

Dave
Daves Tv

SOURCE: LG 42PC5D PLASMA WONT TURN ON. INDICTER LIGHT IS

I have the same problem. Anybody knows how to fix it?

SOURCE: i have a 42" lg

Its either Power supply or your main board. Can't be sure with out doing power checks.