Re: LG 42lh4000 no picture

Sorry, perhaps I was misunderstood - there is no half screen white -> a)-d) always full screen white.

I checked the voltage from the socket at PSU to MB:
- Written on the PSU board it says 20 V, but I measured the following after pressing the turn on button: 22.1 V, drops to 21.6 V, stays there for a moment, than buzzer noise starts and it stays at 21.5 V.
- 12 V: I measured 12.4 V the whole time.

Re: LG 42lh4000 no picture

Thanks for your reply!

I tried the following:
a) disconnected T-CON totally (from main and both side ribbon cables to panel)
b) disconnected T-CON from both side ribbon cables to panel
c) disconnected T-CON from left side ribbon cable to panel
d) disconnected T-CON from right side ribbon cable to panel

a)-d) There's no difference of back light (white screen) and arc sound.

The arc sound starts some moments after booting the TV: White screen starts quite intensive, after some milliseconds...

Hello,

tv model LG 42lh4000

mainboard EAX60686902 (0)
t-con EAX58017201 (9)
psu model EAX55357701/32 (rev 1.3)

The picture got dark from top right to bottom left while using and then it didn't show anything again. I can turn it on and the back light comes up, sound works, but no picture, OSD, ...

There's a soft hum (perhaps electric arc sound) around the two LIF42-inverters on the psu, but perhaps that's normal.

I tried to follow some material from LG Training Center for the 42LH50, but the 42LH4000 has...

Re: New Members - please post your introductions here

Hello I'm Hans from Munich, Germany.