Originally Posted by ludacrisvp
Continuing on this front ... board arrived from HongKong broken (from buyqual) where they hot glued their adapter plate.
They are claiming damaged in shipping and want me to go after DHL, however the box and packing material was undamaged, indicating to me this was broken before packing.
Depending on what happens here I may need to file claim with PayPal.
They provide 2 longer cables and an adapter plug to connect the main boards that they glue to the board (top left corner of image).
They did their best to remove markings that indicate what the board was originally but they didn't grind off the numbers on the back of the board indicating the part numbers as this was printed over top of some traces.
This adapter allows using the stock cable but turns the dual ground into quad ground and single "Va" into dual "Va" that the PN59D550 uses.
I might be able to bypass the broken board with additional soldering of jumpers of my own like the board already has.
They appear to be using a revision of this board BN44-00273A (PSPF350501A):
This appears to be for a 42" plasma "B series" I've found a few TVs with that PSU being PN42B430P2DXZA and PN42B450B1DXZA
Based on photos they don't appear to have adjusted the voltages for the panel as the "Va" and "Vs" pots appear to be in the same position.
Continuing the discussion with myself here...
Had to file claim with PayPal.
Anyways, repaired the broken PCB with some glue and cleaned up the traces that were broken, sanded down the protective coating to allow solder to adhere to these traces and put some clean solder down then added a desoldering braid chunk to each of the broken traces to provide plenty of capacity to handle the current. Verified continuity with multimeter and installed it and it powered up! If one didn't want to repair the board like this there is a connector on the other side of the board that has all of the needed pins except the 'Va' one, which could likely be stolen even from the 'Va' test point that is about 1/4" away from the connector that has them. So really anyone could use BN44-00273A to replace this board if they are able to extend wiring / make some solder connections and adjust the output voltages with a multimeter.
Display came on but had some serious picture quality issues (what i later determined to be pixel misfiring.)
There were 3 large bands of this horizontally across the screen at the top, middle, and bottom, kind of looked like digital static I suppose.
The test panel images were all showing this, with one additional issue, the green panel was 2 shades of green split vertically down the middle.
I tried the factory reset option in the service menu on the off chance this would take care of it, it didn't... that apparently also wipes the service hour information, we were 15,380 hours on this TV (almost 641 days / 1.75 years), now we are back to zero. Which i suppose is ok then we can track how long it lasts after the repair.
Then I recalled reading somewhere about adjusting voltages to the panel to address pixel misfires.
Then I tested the voltages for Va and Vs, the PSU provided by BuyQual was still configured for the 41" display it was meant for, they were around 200 and 45 volts when they should have been 217 and 55, after getting them to 217.4v and 55.8v the display looked great again. This took about 1/2 of a turn and 1/4 of a turn of the potentiometers that control this voltage. Supposedly you can be 'fine' at +/- 10v for these but I would disagree, any under-voltage leads to a nasty image on my panel at least.
I am on firmware 1019.5 (the supposed 'rare' one) and was looking to see if someone had a copy of 1015 / 1016 still which claim to provide a brighter panel vs the newer versions of firmware.