Wharefdale LCD37F1080P - Picture fading

[dick_barton]

I cannot pin this fault down. When switched on at the mains the blue light comes on for about 2 seconds, goes off for about 0.5 sec and comes back on and stays on. This may be normal but I'm not sure.
Using the remote and pressing “power on” brings the set to life after a brief delay.

Most of the time the picture starts off fine, then at some point looks as though it's going through frame collapse (similar to the old TV sets) then the picture darkens until it can no longer be seen. There is no change in backlight intensity. (Pic1, Pic2, Pic3)

Switching off and back on with the remote returns the picture to normal.
It may occur when first switched on and the set is cold or it may operate as normal for 20 mins or more.

I have tried measuring the voltages when the problem occurs but the picture tends to correct itself before I have read more than a few pins.

Percussive maintenance does not bring the problem on but has cleared it on one or two occasions.
Regards

[Hamie]

Re: Wharefdale LCD37F1080P - Picture fading

This is possibly a panel fault.
Take the set down to the tabs, possibly the ones on the side.
With the TV on press on the tabs and see if the picture comes back.

[dick_barton]

Re: Wharefdale LCD37F1080P - Picture fading

Hello Hami,
Thanks for your reply. There are no Tabs on the side but putting pressure on the TCON cables at the top, the tcon being hidden behind the metal plate that the circuit boards are attached to, does not appear to have any affect.
Thanks

[Hamie]

Re: Wharefdale LCD37F1080P - Picture fading

Have you taken the tv down to the panel?

So you can see the tabs like in this photo?

[dick_barton]

Re: Wharefdale LCD37F1080P - Picture fading

Hello Hamie,
No I haven't taken it down to this level yet but have managed to put some pressure on the cables from the TCON to the panel. The problem is where the Tcon is mounted as can be seen in the picture. 4 of 6 which is below the metal panel all the other circuit boards are mounted.
However if need be then I can strip it down, however I would be interested in other opinions if available before so doing.
Many thanks

[Alastair E]

Re: Wharefdale LCD37F1080P - Picture fading

One of VESTEL's finest turds....!

I would agree, Panel Fault.

[dick_barton]

Re: Wharefdale LCD37F1080P - Picture fading

I'll put it to one side for a day or two since I have another power supply to repair. Will post progress once I get back to it.
Thanks to you both for your advice.

[dick_barton]

Re: Wharefdale LCD37F1080P - Picture fading

Stripped it down for parts. May come in useful at a later date.