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Equipment Repairs => LCD TV forum => Topic started by: EVILMRB on October 07, 2015,16:46:24

Title: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 07, 2015,16:46:24

Hi I have a Lg 37lg3000 TV Which when you press the On/Off button the stand-by light flashes three times then the back-light comes on with no picture or sound.Can any body help me with this set please.


I have uploaded a picture of the PSU and the Av Board...If this helps

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: jordan on October 08, 2015,02:35:01

On main board check IC1102 for dry joints

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 08, 2015,18:27:25

Thank you I will have a look at that and get back to you.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: jordan on October 09, 2015,03:24:54

Error code 3
Replace IC105 (memory) 24C512
No 24V at inverter board-replace two FETs on inverter board

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 09, 2015,09:57:24

Invertor working fine.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 09, 2015,16:55:42

Would it be worth buying a new main board because I can get one cheap.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: michael first on October 09, 2015,17:59:38

hi, what about the t-con board?

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 09, 2015,18:32:46

Would still get audio If T-con was faulty.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: old tvman on October 10, 2015,07:45:24

check smd fuse  f1 for open circuit on lvds/tcon board.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: Turnip on October 10, 2015,12:37:38

Hi Evilmrb,

No sound might indicate the set isn't tuned to anything in particular. Maybe a Scart input will enable sound, if there is any.

It's a thought that if the T-con pops, sound usually continues if the backlight does, as P/S hasn't cut to S/by.

The main board problem would be the other option if still no sound, and if 3 flashes represents error 3 as Jordan suggested, it's looking that way.

Best of luck - Chris.

Title: Re: Lg 37lg3000 No Picture / No Sound
Post by: EVILMRB on October 18, 2015,14:31:34

Thank you  to all I have now bought a replacement main board for £15 of Ebay,and all is now working.