Forum: Troubleshooting Power Supplies and Power Supply Design
11-03-2021, 08:09 AM
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Replies: 60
Views: 28,321
Re: Bestec ATX-250 12Z problems and solutions
Hello msb83,
Changing R59 and R60 to a potentiometer works well when trying to center the 5 volt output voltage. I don't think the power supply will allow you to get a range of 2 to 6 volts due to...
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-02-2021, 08:21 AM
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Replies: 6
Views: 928
Re: FSP150-50LG Fault
Whereas there has been no followup on this power supply, I hope you can bear with me with a little humor.
The picture here is a FSP power supply in which the 3.3 and 12v is "missing"!
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Forum: Troubleshooting Power Supplies and Power Supply Design
05-25-2021, 07:50 AM
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Replies: 6
Views: 928
Re: FSP150-50LG Fault
jarenfeldt: I know these posts so far have not been very helpful, but I was hoping to add a little humor to the repair process. Given enough time and money, any power supply can be fixed!
First,...
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Forum: Troubleshooting Power Supplies and Power Supply Design
05-23-2021, 05:02 PM
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Replies: 6
Views: 928
Re: FSP150-50LG Fault
The Bestec ATX250-12E is a great power supply IF you modify the 5VSB. The IMicro power supplies are also great power supplies IF you finish putting in all the parts that are supposed to be there. ...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
10-08-2019, 05:10 AM
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Replies: 5
Views: 1,972
Cheap gaming computer with Intel 975 chipset
I built a computer using an Intel 965 chipset motherboard (Gateway) for use with Microsoft flight simulator FSX. Even with a good video card, the frame rate was low and caused jerky motion. My...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-22-2019, 04:43 AM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
Thank you for the informative reply. I was looking at possibly purchasing IR rework stations, the 872, 860, and 6500. Looks like all would be inadequate. I was also wondering if the MetCal 1100...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-21-2019, 08:07 PM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
Check that southbridge part number. All 82801 chips are NOT the same. You must look at the two letters after 82801 for a match. The grid patterns and number of pins is different.
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-21-2019, 08:03 PM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
Indeed this was my first attempt at southbridge BGA replacement. I experimented with a lot of temperature profiles before starting. I removed the BGA chip on three practice boards before attemping...
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-20-2019, 06:14 PM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
I counted twelve broken circuit traces. This shows a group of three. Some boards are simply beyond reasonable repair. So what do you think?
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-20-2019, 06:11 PM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
Here is another broken trace. I made a picture with red circle to show the broken trace, and a picture without the red circle to get a closer perspective.
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
03-20-2019, 06:06 PM
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Replies: 12
Views: 3,694
Re: Elite 945GCT-M3 dead
Always nice to see the final results on a repair project, and this motherboard is no exception. Most boards can be fixed by replacing bad capacitors, so most of the capacitors on this board were...
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Forum: Troubleshooting Power Supplies and Power Supply Design
12-29-2018, 05:54 PM
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Replies: 9
Views: 1,569
Re: Fixin computer power supplies as a hobby
Pictures on this forum always make a big difference. Also nice to see an occassional picture of the guys (and gals) crazy enough to attempt repairing computer power supplies. So I decided to post a...
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Forum: Troubleshooting Power Supplies and Power Supply Design
12-26-2018, 09:53 AM
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Replies: 9
Views: 1,569
Re: Fixin computer power supplies as a hobby
Once you have repaired a computer power supply, the best test for a long term reliable repair is to put it in a computer, and run it for an extended period of time. After repairing (and modifying)...
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Forum: Troubleshooting Power Supplies and Power Supply Design
12-26-2018, 09:32 AM
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Replies: 9
Views: 1,569
Fixin computer power supplies as a hobby
Ten years ago I attempted my first computer power supply repair. For the next ten years, it has become a hobby. I went to several computer shops asking for dead computer power supplies, and...
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Forum: Troubleshooting Power Supplies and Power Supply Design
10-26-2018, 02:50 PM
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Replies: 15
Views: 1,616
Re: "Magna" 300W ATX PSU (bad workmanship inside)
I replaced some wimpy IMicro transformers with some larger better transformers. Worked OK. Some other things to keep in mind....the base capacitors should be replaced....use 4.7 uF or 10 uF instead...
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Forum: Troubleshooting Power Supplies and Power Supply Design
10-21-2018, 06:27 AM
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Replies: 15
Views: 1,616
Re: "Magna" 300W ATX PSU (bad workmanship inside)
Changing transformers is a risky business. EXTREMELY DANGEROUS. When you decide to send a power supply to the junk box as not fixable, leave the transformer soldered to the original pc board. I...
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