Hello there this is my 2nd post in this great community, always reading and learning something new.
I'm going straight to the point, I have this graphics card XFX Radeon HD 1ghz Edition which I was using with a faulty PSU (CoolerMaster 450w), I said faulty because the PSU was old and showing some symptoms, like the power wasn't enough for this card, so to in order to use it I decided to underclock it and it keep functioning. One day suddenly the PC reboot and the card is not displaying any signal or it's detected by Windows or Linux. When I plug this card in the PC the fan spin at full speed for a few secs and then it lower the speed at normal, I read in another website that this is a signal that it's shorted.
Going back to the card I'm going to describe what I found, primarly the 4 mosfets in the right side of the first image, I retired them I check with a multimeter and they are OK (not shorted), the PCB is the problem since the place where is soldered it's shorted. And a few other caps near that are shorted too but this maybe be something normal since some of them acts like a filter.
I suspect of the PWM , it's a APW7098 and I need some knowledge of yours to give me a clue where to start.
Also I found this other thread which discussed a similar problem, found it very helpful https://www.badcaps.net/forum/showthread.php?t=35004
In the attached images I marked with green the components that aren't shorted, and with red those who are. Some of them I desoldered to check if they were faulty.
Best regards.
I'm going straight to the point, I have this graphics card XFX Radeon HD 1ghz Edition which I was using with a faulty PSU (CoolerMaster 450w), I said faulty because the PSU was old and showing some symptoms, like the power wasn't enough for this card, so to in order to use it I decided to underclock it and it keep functioning. One day suddenly the PC reboot and the card is not displaying any signal or it's detected by Windows or Linux. When I plug this card in the PC the fan spin at full speed for a few secs and then it lower the speed at normal, I read in another website that this is a signal that it's shorted.
Going back to the card I'm going to describe what I found, primarly the 4 mosfets in the right side of the first image, I retired them I check with a multimeter and they are OK (not shorted), the PCB is the problem since the place where is soldered it's shorted. And a few other caps near that are shorted too but this maybe be something normal since some of them acts like a filter.
I suspect of the PWM , it's a APW7098 and I need some knowledge of yours to give me a clue where to start.
Also I found this other thread which discussed a similar problem, found it very helpful https://www.badcaps.net/forum/showthread.php?t=35004
In the attached images I marked with green the components that aren't shorted, and with red those who are. Some of them I desoldered to check if they were faulty.
Best regards.
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