I have acquired a Bestec ATX-250 12Z and thought I would start a new thread just for this model Bestec - problems and solutions.
Don't know the full story on why this one was pulled out of service. It powered up with the following voltage readings:
5vsb 4.99 volts
12v 12.02 volts
5v 4.99 volts
3.3v 3.38 volts
The first capacitor of the 5vsb pi filter (C36) was bulged. Also, in two areas, the glue on parts was black and brittle. Other areas of the power supply the glue was a brownish yellow. This would indicate to me that certain areas of the power supply were hotter than others - probably when the computer was powered down, the 5vsb still working, and the fan off. The 5vsb diodes were located in these two areas. A picture is worth a thousand words, so take a look at the attached picture.
Don't know the full story on why this one was pulled out of service. It powered up with the following voltage readings:
5vsb 4.99 volts
12v 12.02 volts
5v 4.99 volts
3.3v 3.38 volts
The first capacitor of the 5vsb pi filter (C36) was bulged. Also, in two areas, the glue on parts was black and brittle. Other areas of the power supply the glue was a brownish yellow. This would indicate to me that certain areas of the power supply were hotter than others - probably when the computer was powered down, the 5vsb still working, and the fan off. The 5vsb diodes were located in these two areas. A picture is worth a thousand words, so take a look at the attached picture.
Comment