Have I been sold a faulty T-con

[blib]

Hi guys. I would appreciate your advise on this one.
The TV is a LG42LH3000 with the left hand 50% of the screen being black. The fault is intermittent and tapping the Tcon board or surrounding area will clear the fault for a while.I have just replaced the Tcon which came from Ebay.I still have the same fault.Have I been sold a dud as I thought only the Tcon can cause this.

[tom66]

Re: Have I been sold a faulty T-con

Left hand screen black or just dark, with a visible picture? Sharp cut off between sides or gradual? Sounds more like panel, sadly...

[JimmysTGP]

Re: Have I been sold a faulty T-con

Yes, if you have replace the T-con and results the same then Panel was the problem originally. Sometimes I have been able to manipulate by Jamming something behind the TCP ribbon cable thats causing the Bad connection. However its not Permanent fix.

[blib]

Re: Have I been sold a faulty T-con

Yes Tom sharp cut off between sides. Left hand side completely dark.I have a feeling could be bad soldering on the tcon.Maybe its a common fault.I have just tried to reflow the ics on the board.Working at the moment.Fingers crossed.

[Mt.Man]

Re: Have I been sold a faulty T-con

Try reseating the ribbon cables from the panel to the Tcon.

[blib]

Re: Have I been sold a faulty T-con

Yes have done that and cleaned with contact cleaner.

[multimeter]

Re: Have I been sold a faulty T-con

also,try blasting some freeze spray on the panel ribbons if fault dissapears you at least know the panel is faulty,strange though that tapping the t con makes it better,as that wouldnt cause any movement on the panel ribbons, lvds yes,it must take quite a whack on the t con to make the fault dissapear

[blib]

Re: Have I been sold a faulty T-con

It did not take much of a tap,mainly on the big ic in the middle of the board.I think the replacement board has the same issue.Will keep you posted.

[multimeter]

Re: Have I been sold a faulty T-con

hmm sounds like a dry ic then ,that would be a good fix,did you use hot air and flux?

[blib]

Re: Have I been sold a faulty T-con

Yes.Hope the repair does not bounce

[selldoor]

Re: Have I been sold a faulty T-con

also,try blasting some freeze spray on the panel ribbons if fault dissapears you at least know the panel is faulty,

@Multimeter -Bit off topic but how does that work?

[multimeter]

Re: Have I been sold a faulty T-con

@Multimeter -Bit off topic but how does that work?

the freeze will crush up the bond between the ribbons and its contacts

[selldoor]

Re: Have I been sold a faulty T-con

the freeze will crush up the bond between the ribbons and its contacts

Ok - thanks - would heating have a similar effect?