Sure I could have gotten a new supply, but I'm not one to just replace something when it only needs a few parts known to be higher failure items due to the cheaper quality of the parts used.
Now had they used the same brand for those two that they did for the four they might not have even been bad.
That said I suppose those two 6.3 volt caps were on the +5 volt circuit which is running them very close to max voltage. Could have contributed to their failure.
I ordered the 6 caps I needed.
Most often the caps on the output of the supply fail because they are under a lot more stress than the rest of the power supply caps.
I only use Mouser for things like capacitors due to the wide availability of various voltages, values ETC... Plus it's very easy to find the exact capacitor I want.
For switch mode power supplies I look for capacitors specifically rated for that type of use and I get the ones with the lowest ESR, highest ripple current, highest temperature and longest life.
I got the cables soldered and heat shrink covering all joints.
Used a couple old CD-ROM drives as a load and fired the supply up so I could check the voltages to make absolutely sure I have it wired right. Everything checked out good. I also checked the ripple voltage on all the outputs and there was minimal to no ripple.
So I'll do a brief test this afternoon as I feel confident the supply will be ok for a brief test.
Doesn't really matter now, but I was wrong about the original motherboard connector of the power supply having just 20 pins.
It has 20 pins, but there's a slide on four pin connector with +5 +12 +3.3 and ground so it would actually be a 24 pin.
Now the power supply has been running the last 20 minutes with two CD drives and one old hard drive without issue. Not much of a load, but at least it's something.
If it works with the PC and doesn't blow out hot air I'll leave it as is and just replace the caps. Otherwise I will need to speed up the fan which could be done by replacing the temp sensor (if it is a resistor) by a variable resistor or just wiring the fan to +5 Vdc or maybe to the +12vdc and +5Vdc which would give +7 Vdc to the fan.