OK I know this probably ain't the best quality monitor in the world, but I got it non-working for almost nothing, and getting it going has turned into a bit of a personal challenge. It came totally dead, but after changing the power mosfet, a couple of resistors and the PWM I/C it now lights up (I guessed that the blown SM resistor in the first pic below read 471, and soldering a 470 ohm 1/4 watt resistor over the top seems to work), but I just get a white screen.
Now looking at this thread on the Samsung Synchmaster and the earlier HP thread it refers to, it seems likely that there is a problem with the T-Con board. I've been through and tested all the caps I can recognise and none seem to be shorted (damn those oh so similar looking SM inductors for the hopes they gave and took away), and measuring the likely test points gives me the following readings:
VDDD 30KOhm 3.3v
VDDG 100KOhm 24.2V
VEEG 146KOhm -6.6V
VDDA 8KOhm 13V
There are a bunch of test points in the top right labelled POL, LP, VCOM, STH_F, VDDG_FLK, XDON, OE, STV, CLKV which all read open wrt ground, but I'm not sure if they are relevant.
Or have I got a problem on the video board itself? I'm not quite sure where to go now.
Now looking at this thread on the Samsung Synchmaster and the earlier HP thread it refers to, it seems likely that there is a problem with the T-Con board. I've been through and tested all the caps I can recognise and none seem to be shorted (damn those oh so similar looking SM inductors for the hopes they gave and took away), and measuring the likely test points gives me the following readings:
VDDD 30KOhm 3.3v
VDDG 100KOhm 24.2V
VEEG 146KOhm -6.6V
VDDA 8KOhm 13V
There are a bunch of test points in the top right labelled POL, LP, VCOM, STH_F, VDDG_FLK, XDON, OE, STV, CLKV which all read open wrt ground, but I'm not sure if they are relevant.
Or have I got a problem on the video board itself? I'm not quite sure where to go now.
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