Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

[Aiove]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

I tried it but I didn't have clear instructions

Don't think I did it right

[tom66]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

PIns 3-4 need to be bridged and LVDS unplugged.

[Aiove]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

Lvds?

[tom66]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

Sorry -- cable going between main board and control board.

[zedexnz]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

Did you end up resolving this????

I have a similar TV which I am working on. If i remove the Y-SUS the rest-drv error disspears, so I am suspecting the y-sus board. With the ysus plugged in, I get the error.

I have noticed that the screen as a few fractures in the glass, and wonder if this has caused extra loading on the ysus board causing it to go bad????

[tom66]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

I have noticed that the screen as a few fractures in the glass, and wonder if this has caused extra loading on the ysus board causing it to go bad????

Yeah, this would stop it working. Any crack in a plasma panel permanently damages it, preventing light emission. It will not work without a new plasma screen.

[zedexnz]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

Thats interesting about the cracks, I know some panels have a sheet of glass before the actual panel, but alot of the newer panels are so thin that I dont think that is the case in this situation.

Although I did manage to get the display to light up for a sec before it shut down in what i suspect is a safety/protect mode.

I disconnected the "data" cable to the YSUS, but left the power cable which feeds the ysus and zsus boards, and the unit powers up without the DRV_Reset error.

I though this might be to do with the driver buffers, so I disconnected the y buffer board also from the ysus, but still the same.

So it looks like when the data cable which has a DRV_Reset line is connected to the main controller, it causes the unit to go into safety mode.

Would anyone have any further info about what the logic in which this works. All the power levels are correctly measured.

Although the screen does have some fractures, it had been working for about three months until it died....

[tom66]

Re: Samsung PS50C550 (S50FH-YB06) Sound but no picture (or glow)

It is possible the crack has failed further/progressed, which I have seen before, some users report their set works for some days after being cracked. These units do not have a protective glass sheet, the front glass is the plasma panel.

The quick hints guide may help