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Equipment Repairs => LCD TV forum => Topic started by: netdent on October 05, 2011,16:20:41

Title: 42LG3000 screen problem
Post by: netdent on October 05, 2011,16:20:41

Ok I think I know the answer to this one but will run it buy you guys anyways, this is a 42 lcd not plasma, at switch on white screen after few mins pic appears but its blurring as in movement is slow, for instance guy moves his arm you can see loads of arms, sort of slow motion, seen this on samsung panels and they were fooked! but not seen on LG

cheers Ronnie

Title: Re: 42LG3000 screen problem
Post by: tv tony on October 05, 2011,21:17:54

sorryits the bonding to the screen, we get it a lot

Title: Re: 42LG3000 screen problem
Post by: netdent on October 06, 2011,03:58:32

Cheers Tony, bonding as is top ribbons along top of panel?

Ronnie

Title: Re: 42LG3000 screen problem
Post by: sinclairtv on October 07, 2011,13:46:02

Try some folded cardboard along the screen contacts between the metal and the cabinet to push the ribbon contacts tighter to the screen. Worked for me

Title: Re: 42LG3000 screen problem
Post by: netdent on October 07, 2011,14:02:04

was going to try that then decided just to strip the boards out!! real shame as a nice set

cheers Ronnie

Title: Re: 42LG3000 screen problem
Post by: netdent on October 10, 2011,12:13:01

Well I had a rethink on this and glad I did, now fully working, hope this helps others, I removed the metal frame around the lcd panel this exposes all the ribbons on top of panel, had sat facing skywards on its back powered set on then ran my finger along each ribon where it joins the long pcb, the ribbon furthest left applying light pressure to one side instantly cured the fault

So what I did was cut a piece of the jelly like sponge found underneath some plasma pcb's, sat it over the troubled area thick enough to be tight fit, then gently lowered the frame back over the lcd screwed it all together, been running now for 3 hours perfect picture, how long it will last is the question

thanks Ronnie

Title: Re: 42LG3000 screen problem
Post by: sinclairtv on October 11, 2011,13:32:15

Update..broke down again with same problem. :33:

Title: Re: 42LG3000 screen problem
Post by: davenjax on October 11, 2011,14:05:27

hi i can share your frustration i had two of these in and never managed to cure them as you say they are nice tvs otherwise

Title: Re: 42LG3000 screen problem
Post by: digitech1962 on October 12, 2011,16:00:52

Have done  a few of these now use double sided foam tape about 5mm layered cut to full size of tab usually left side as look from front.        B&Q or the range do this stuff hope helps Dave.

Title: Re: 42LG3000 screen problem
Post by: netdent on October 24, 2011,09:19:13

Ok this worked for 2 weeks and now came back with a diffrent fault? backlight failure, lights for a few seconds flickers then goes out, this set has master and slave invertors, how to isolate the problem? good 24volts to both boards, I think one of the transformers on the master might be open? but not got one to replace, any help welcome

thanks Ronnie

Title: Re: 42LG3000 screen problem
Post by: Turnip on October 24, 2011,11:35:30

Hi Ronnie,

What inverters ? - Chris

Title: Re: 42LG3000 screen problem
Post by: g*****s on December 14, 2011,02:12:10

Quote from: netdent on October 10, 2011,12:13:01

Well I had a rethink on this and glad I did, now fully working, hope this helps others, I removed the metal frame around the lcd panel this exposes all the ribbons on top of panel, had sat facing skywards on its back powered set on then ran my finger along each ribon where it joins the long pcb, the ribbon furthest left applying light pressure to one side instantly cured the fault

So what I did was cut a piece of the jelly like sponge found underneath some plasma pcb's, sat it over the troubled area thick enough to be tight fit, then gently lowered the frame back over the lcd screwed it all together, been running now for 3 hours perfect picture, how long it will last is the question

thanks Ronnie

Be carefull where you use the "jelly like foam" as it is conductable.