Flux capacitors, not fluxing(where can I get new)

[geoschmo]

Replace the board, you are wasting your time.

Capacitors almost NEVER pop like that all by themselves. And if more than one is popped, then you can take the "almost" out of the previous sentence. Something else on the board is shorted out. Don't bother looking for the short, it's probably one of the IC chips arced internally and is putting volts on a circuit where is doesn't belong which is causing the caps to pop.

It's also quite possible your original power supply went bad frying the MB. But the chances that the only components on the MB that went bad were the 6 capacitors that you can visually identify as popped are infinitesimal.

Unless you have the schematics for the board, which you don't have, probably can't get, and wouldn't know how to use if you did, you have no chance of troubleshooting the problem down to the component level.

Unless you just need some soldering practice, in which case have at it. But may I suggest that you buy an AM/FM radio kit instead? At least then your soldering will have some practical purpose.

[Suicide Junkie]

I've replaced capacitors on an old motherboard from this era

Its ready to play StarControl 1 again.

If the board is under warranty, let them fix or replace it.
If not, then take a shot. It might just become an impressive story for your resume.

[Thermodyne]

Contact the manufacturer of the board (or PC if OEM) and request a replacement. The bad caps saga is a long story but boils down to using parts from substandard suppliers who were using an incomplete formula to produce their electrolyte. The formula was stolen from a Japanese company, three guesses who stole it, and then built and dumped the caps on the market.