LG 42px3rv shouts off

[nbdy]

When i turn the TV for the first time it works for 1-2 minutes,then turns off ...

Afther that when i try to turn it on it comes to orange light and red again (no turning on the screen)

The voltage measures are all OK,the fuses are all ok ...

I have disconected the ZSUS board and the tv goes off ...

When I disconet the YSUS board the TV goes down after 1-2 minutes ...

[Andrew F. Ali]

Re: LG 42px3rv shouts off

What voltages are you getting: Va, Vs, etc??

[nbdy]

Re: LG 42px3rv shouts off

Va 190V,Vs 64V,VS-ON 4.5V,BL-ON 4.5,STBY 5V,Vcc 5.2V

[ReeceyBurger123]

Re: LG 42px3rv shouts off

Is that with the set working ?

[nbdy]

Re: LG 42px3rv shouts off

What set ??? Didn't find it

[maxvalutech]

Re: LG 42px3rv shouts off

He means the TV are the voltages ones you measure while it is going - take the vs va at switch on with probes already in place then check if the other small voltages stay on or not.

[ReeceyBurger123]

Re: LG 42px3rv shouts off

Let me rephrase that for you. What voltages do you get when the Tv works and when the Tv does not work from the power supply, please measure Vs and Va mainly.

[nbdy]

Re: LG 42px3rv shouts off

Ok,the voltages I messured are in the 2 minutes the TV is ON

[ReeceyBurger123]

Re: LG 42px3rv shouts off

Ok when the Tv does not work then, in a dark room does the screen appear to glow ?

[nbdy]

Re: LG 42px3rv shouts off

Must try this today, I'm at work now

[ReeceyBurger123]

Re: LG 42px3rv shouts off

Ok bud, if in a dark room when the Tv does not work but screen is lit up the control board will probably be the issue but if its not lit up even slightly probably the susboards but thats unlikely we shall see anyway.

[nbdy]

Re: LG 42px3rv shouts off

Ok, will check, thx for fast reply

[nbdy]

Re: LG 42px3rv shouts off

Sorry didn't find the edit button for post ...

The TV does not glow in a dark room ...

The voltages on stand by are:
AC-ON - 4.5V
BL-ON - 40mV
STANBY - 5V
Vs-ON - 41mV
5VNom - 0V (somthing like that writes on board)
Vs - 300mV (YSUS)
+5V - 0V
Vcc - 0V
Va - 16mV
Vs - 220mV (PS board)
19V - 0V
6V - 0V
3.4V - 40mV

Forgot to say that when I try to power it on again the orange led glows,and goes back to red ..
When the TV is ON the green goes to orange and then to red ...

When I unplug the TV from 220V and turn it on after cca 5min it works again for 1-2min

[nbdy]

Re: LG 42px3rv shouts off

Do I have to mesure somting else

[nbdy]

Re: LG 42px3rv shouts off

someone to help ???

[dick_barton]

Re: LG 42px3rv shouts off

Have a read though the following:-

https://www.badcaps.net/forum/showthread.php?t=18542&

[nbdy]

Re: LG 42px3rv shouts off

thx

[nbdy]

Re: LG 42px3rv shouts off

OK,I have read the tom66 guide,but didn't find the symptoms ...

My TV goes off after 1-2 minutes with no picture and no sound and I can't turn it on (orange and then red light) ...

Could it be power supply

when the TV is on the picture is OK