Question about Gateway FPD2275W LCD Monitor

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19" Proview 900p lcd monitor backlight

I brought this monitor from an auction, upon testing the backlights were dead as i shone a lamp on the screen and the image could be seen.
Opening up the monitor i looked around at any obvious problem like buldging capacitors or burnt components but none to report.

There is a a 10 way connector on the board where the inverter and power supply are combined; this connects into the main video board inside the monitor .

The pins are as follows :
12v
GND
5v
BL
GND

I tested the 12v line which is supplied from a 7812A transistor and from this all im getting is 4.3v and this is even with the monitor turned on and the video cable wired up to the pc, So i dont know if the transistor is at fault really.

Could do with a little bit of help on the subject.

Thanks

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Change the capacitors (all but maybe the main should be done- if you change just bad ones now, the others will take the heat and go soon). They do not have to be bulged or leaking to be bad.
Then if that doesn't help, shoot for transistors.
I fix these and have had many pretty ones not work.
ebays bammbammfran

Posted on Oct 10, 2008

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The 7812 device is a voltage regulator. Either the reg has failed or the input to the reg is no longer approx 12volts. It should be more than 12volts so that the reg can control the o/p .

Posted on Sep 05, 2008

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