Philips 42PF5331/10 Plasma stuck looping test pattern

[Chodax]

Hello all, first post and sorry if am posting a question that has already been answered but search turned up nothing. Basically my mother has the above plasma TV and it has worked fine for 3 years or so but a couple of days ago she turned it on and it started cycling through red green blue screens, then a crosshatch screen and finally a test card screen. The screen itself seems fine, the red green blue screens are solid with no errors and good strong colour, crosshatch is a bit messed up with a bit of flickering but the test card is spot on as well.

Not knowing much about plasma technology I am at a bit of a loss but the screen itself seems fine so I am suspecting a dodgy controller board of some kind but have no idea where to begin. Haven't fixed a plama before but I have done some board level mods on old PC motherboards many moons ago so I am willing to have a dabble (taking full precautions of course), just need some advice and pointing in the right direction if possible.

Many thanks.

[retiredcaps]

Re: Philips 42PF5331/10 Plasma stuck looping test pattern

just need some advice and pointing in the right direction if possible.

http://elektrotanya.com/

has service manuals for many TVs. Try looking there first.

[Chodax]

Re: Philips 42PF5331/10 Plasma stuck looping test pattern

Ok thanks bud, grabbed a service manual and will try all the obvious stuff like service mode and reseating all connectors first.

[PlainBill]

Re: Philips 42PF5331/10 Plasma stuck looping test pattern

Ok thanks bud, grabbed a service manual and will try all the obvious stuff like service mode and reseating all connectors first.

Quick and easy test. Pull the LVDS cable that links the Small Signal Board (the one with all the inputs) to the Main Control Board (behind the SSB). The Misc Main Board often has a test mode that will do what you are seeing. It could also be a test mode on the main board, but usually they exit test mode if power is turned off.

PlainBill