What a great forum, thank you to all the participants.
The problem started out with a black screen. The blue led would light when there was a vga signal and the orange when the signal was removed.
I replaced all the caps (except the big one) and the two mosfets. When I tried the monitor after the recap, the led's would not light. I measured 13+ volts going to the logic board, but the 5v was missing. I traced it to a blown f102 fuse. I soldered in a temp fuse to continue testing.
Now when I apply power, both the blue and orange led's stay lit, but no monitor display.
I'm no stranger to the soldering iron, having been a tinkerer for the past 50 years. I confirmed that none of the caps are shorted and to the best of my ability checked there are no solder bridges.
One other observation, not sure if it is important. After powering down and attempting to discharge the caps, the only one with any charge after a minute or so is C200 (220uf 25v) in the very center of the board.
Any thoughts?
The problem started out with a black screen. The blue led would light when there was a vga signal and the orange when the signal was removed.
I replaced all the caps (except the big one) and the two mosfets. When I tried the monitor after the recap, the led's would not light. I measured 13+ volts going to the logic board, but the 5v was missing. I traced it to a blown f102 fuse. I soldered in a temp fuse to continue testing.
Now when I apply power, both the blue and orange led's stay lit, but no monitor display.
I'm no stranger to the soldering iron, having been a tinkerer for the past 50 years. I confirmed that none of the caps are shorted and to the best of my ability checked there are no solder bridges.
One other observation, not sure if it is important. After powering down and attempting to discharge the caps, the only one with any charge after a minute or so is C200 (220uf 25v) in the very center of the board.
Any thoughts?
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