Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

[tom66]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

Sounds like A board - LVDS cable and fan connections connected? If you disconnect all power and LVDS connections from A board then power set up, the screen should turn on full white. Does it? (Don't run more than 30 secs as fans don't spin in this state.)

[DavyMac]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

If the two power power cables/connectors are just along from the LVDS connection then removed those but nothing powered up. Still got the black screen

[tom66]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

I think there are three - one goes to the D board. This also needs to be removed for this test.

[DavyMac]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

Tried these no joy TV doesnt even power nor the relays kick in, I've tired an A board which is supposed to be good however when I fit this I get the 7 flashing red lights

Any ideas next?

[tom66]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

7 blinks with A board makes no sense, there is no way I can think of the A board causing that fault code. Are you sure it's 7, and not 10,11,12,13...?

[tw2005]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

If the two power power cables/connectors are just along from the LVDS connection then removed those but nothing powered up. Still got the black screen

For white screen, it's A5, A6, A7 disconnected and turn on. If similar to the PZ80/800 the front LED will not be connected / not lit.

As for the fans, A30 needs to be connected to PB30. Since this has no 11 blink shutdown I'm wondering if it's PB board issue. If A30/PB30 are disconnected I'd expect no fans and no blinks as the SOS is a high on error at the PB board.

Have you gone back to original LVDS cable, original D board and original A board all at once to see what this does?

Training guide for PZ80/800 suggests D board can be 7 blink

[DavyMac]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

Not gone back to the orginal boards etc yet, However it's odd that when the new A board is fitted I get the 7 blinks, counted them a few times to make sure what the flashes were,

However when I fit the old board back in I get the rapid green light at the front then goes solid but won't power up? Can hear the relays click twice though.

[tw2005]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

Not gone back to the orginal boards etc yet, However it's odd that when the new A board is fitted I get the 7 blinks, counted them a few times to make sure what the flashes were,

However when I fit the old board back in I get the rapid green light at the front then goes solid but won't power up? Can hear the relays click twice though.

Well, I don't know these too well but with so many items swapped in and out there's always a chance of introducing faults. getting it to lock on with no blinks is progress.

I'd be inclined to put original LVDS,D and A board, check all cabling. check PB board is connected see what you get. If no good, I'd retry removing a5,6,7 and see if you can get the white panel.

Sounds like original fault was SC board. If it has ribbons out of the D or A board check for corrosion and damage.

maybe a picture of everything as you have it, comparison photos of original to replacement parts just in case there's some variation that's not compatible.

If it blinks green then locks on it's powered up you just don't have a display and if the onbaord LEDs are lit on the Sc/SS then they're on and running.

[DavyMac]

Re: Panasonic 42" plasma screen TH-42PZ82BA cheap fix?

Right had a play about this evening, If I leave off A5/6/7 the LEds on the SC/SS boards light up. When I plug just 6&7 in the relay kicks in if I plug in A5 on it's own nothing happens.

Now when all 3 are plugged in the LED's on the SC/SS board fail to light up. swapped the SC board/and A board over and still get the same fault the A board that I ordered seems to be U/S as this gives off the flashing lights as mentioned. is it looking like a power board fault? The power board looks as if it's had a 10 blink fault repaired as theres some grey silcone? stuff around the chip.