LG: DT-42PY10x "issue with colours"

[Alex-g]

Hi,

I picked up this plasma off the side of the road (why not)

And it worked OK! Bright colours and no burn in.
It started out with sparklies on certain colours, or strangely only in the background (hooked up a Game console) but they went away after a few mins of warm up, and ran for a few hours for a proper check.

Later when i went to watch a movie i noticed its come back, and worse now with whole colours being strange.

Attached pics of issue

Funny colours
http://s17.postimg.org/ay6yvfqjz/IMG...113524_003.jpg
Back of set
http://postimg.org/image/r3wc4nrwl/

Ive gone through the "plasma troubleshooting" sticky, hence the sparklies part. But to little avail.
Ive checked most voltages i can find and tweaked them, all correct but no difference.

There are stacks of adjustments though, (-Vy), (Vscan), ect. Which i can find both the pots and test points for (usually across a resistor or something) But no info on correct voltages.


The set is now OK on switch on, then after 30 secs colour definition degrades, almost the opposite issue. Makes me think an issue with things changing as it warms.

Any pointers?

EDIT:
After turning off and re-seating all the little Y ribbons on the left hand side, it now looks like this
http://postimg.org/image/kjka1hwbb/

And after it has run for a bit the screen goes purpley.

Cheers,

Alex

[Alex-g]

Re: LG: DT-42PY10x "issue with colours"

I've now found if I twist the set sparklies/purple may disappear or appear, so thinking a connector or solder joint (god I hope not)

I've got the main board off and I'm down to the individual connectors cleaning and touching up with CRC contact spray. Found another 3 adjustments pots too.

All fuses and voltages are Ok as far as I can tell. (Va, Vs, 5v, 12v)

Any pointers at all? This is the first plasma I've opened up and aside from the guides I've read I'm pretty well flying blind.