This unit was experiencing the common symptom of screen going black
after a few seconds of turn on. Turn off and on again, problem would
repeat, but things got better with some dark splotches on successive
cycles of turning off and on until after about 2 minutes, the screen
would stay on properly and then work fine thereafter.

I disassembled the unit and on the power board I found possible
sources of the problem. There was a film capacitor (C11) pushed up
against and in contact with the heat sink on a transistor (only heat
sink on the board). It was brown in color, but on further inspection,
the original color was bright red, the brown discoloration may have
been due to heat or leak through. Additionally, the power mosfet
MTP23 was leaking a brown substance from the lead end onto the board.
All the electrolytics tested fine with my esr meter and also looked
fine.

The "Display Type" is GH17MS with a "Model Code" GH17VSSN. The power
board was designated GH15/17 Rev 3.0. The value of C11 is
unreadable. How would I got about finding the value of this capacitor?

On Oct 15, 6:43 pm, Rob wrote:
This unit was experiencing the common symptom of screen going black
after a few seconds of turn on. Turn off and on again, problem would
repeat, but things got better with some dark splotches on successive
cycles of turning off and on until after about 2 minutes, the screen
would stay on properly and then work fine thereafter.

I disassembled the unit and on the power board I found possible
sources of the problem. There was a film capacitor (C11) pushed up
against and in contact with the heat sink on a transistor (only heat
sink on the board). It was brown in color, but on further inspection,
the original color was bright red, the brown discoloration may have
been due to heat or leak through. Additionally, the power mosfet
MTP23 was leaking a brown substance from the lead end onto the board.
All the electrolytics tested fine with my esr meter and also looked
fine.

The "Display Type" is GH17MS with a "Model Code" GH17VSSN. The power
board was designated GH15/17 Rev 3.0. The value of C11 is
unreadable. How would I got about finding the value of this capacitor?

OK, I found a board that appears to be identical to mine he

http://www.lcdrepair.us/1504fp-power.html

The bad mosfet is in the upper part of the board just to the right of
the bank of six capacitors, you can make out a corner of it behind the
white ribbon cable. The mysterious capacitor C11 cannot be seen, it
is adjacent to the heat sink on the side of the mosfet. There is
another similar film cap, but it is too far from the heatsink to make
contact with it.