Philips 42PFL7603D Losing brightness

[anotherdude]

Friend is having problems with this set apparently parts of the screen lose brightness and go dim, sometimes it works fine and then goes like this and other times it's like this from start up.

Power problem?

sorry for the poor picture

[tom66]

Re: Philips 42PFL7603D Losing brightness

Panel tab bonds, sometimes repairable.

[sordids999]

Re: Philips 42PFL7603D Losing brightness

sorry to hijack this thread but did you ever fix your problem
got this set today where one side seems to be ghosting images and dark

[tom66]

Re: Philips 42PFL7603D Losing brightness

Definitely looks like a tab bonding fault...

[Ta91Ko]

Re: Philips 42PFL7603D Losing brightness

Hello, did you manage to repair the fault? I think I have the same problem.

[nomoresonys]

Re: Philips 42PFL7603D Losing brightness

Probably a backlight issue, 15 years is a pretty good run for those leds.

[Ta91Ko]

Re: Philips 42PFL7603D Losing brightness

Don't think it is backlight problem due to image retention...

[lotas]

Re: Philips 42PFL7603D Losing brightness

Probably a backlight issue, 15 years is a pretty good run for those leds.

This model does not have LEDs.
To begin with, distort the LVDS cable, carefully clean the contacts on this cable.

[nomoresonys]

Re: Philips 42PFL7603D Losing brightness

This model does not have LEDs.
To begin with, distort the LVDS cable, carefully clean the contacts on this cable.

Oops, my bad, it was one of the first with ambilight tech, but i shouldn't have assumed it was led backlighting.

[nomoresonys]

Re: Philips 42PFL7603D Losing brightness

Probably poor tab bond contact, many have been "fixed" with shimming.

[nomoresonys]

Re: Philips 42PFL7603D Losing brightness

Something that you can try is take your knuckle and tap on the bezel NOT the screen, tap all along it, see if the display ever changes any, like clears up for a second or anything.

[Ta91Ko]

Re: Philips 42PFL7603D Losing brightness

I tried the knuckle test, you were right. The screen does clear for a moment. Looks like it is bad tab bond contact. Is it possible to repair it?

[nomoresonys]

Re: Philips 42PFL7603D Losing brightness

Here's a shim job done on a sanyo, he does all of them, I was lazy and just did the one that wasn't getting good contact but its working fine, I guess all the trouble it is to tear down, might as well do them all, there's a bunch more videos on youtube about the procedure, some use flexible tubing and such, just need something that's going to keep a little pressure on it for good contact and not damage it of course: https://www.youtube.com/watch?v=purk_SyiT44