Re: Dell 2007FPB teardown

Updates :
This morning I decided to go the trial & error way, since I don't have access to a scope. The first thing I did was swap the two PWM controller IC's in order to see will the problem power lines follow the IC's - I thought that the 3.3 and 12V will come up and the 5V will go down, but nothing actually changed. Conclusion - the problem is elsewhere.

And hour or so after that I found a resistor out of spec (think it was 4k7 or 47k, I forgot it already) under that white blob of dielectric-used-to-be stuff under the first PWM...

Re: Dell 2007FPB teardown

Looking at my post, and desperately trying to find the S/C, measuring here and there I glanced at the multimeter and a lightbulb went off in my head.
Thinking in Ohm's law - my "dead short" is actually somwhere in the 3ohm region, on a 3.3V rail, thats just over an Amp. Given the "2A rating" of the supply rail (2x1A schottky diodes in the power supply) I'm starting to think that there's nothing wrong with my digital board and will try to focus getting the buck converter board to work and give it a shot with the *load* connected....

Re: Dell 2007FPB teardown

Hello, friends electronics & electricians.
I have recently aquired a Dell 2007FPB monitor and it's in near mint condition, but sadly - not functioning.
I work in the electronics area and I'm aware of the Ohm's law and etc., but it's difficult to repair the monitor without a service manual, even worse - without a single schematic. The pics and info in this thread have been very useful and I made a couple of conclusions but need help in order to continue with the repair.
My questions are mainly to the thread starter, [B]budm[/B],...