Neo Geo and CPS1 okay, CPS2 blows Power Supply's 5V/5A fuse?

[Numbski]

Oh the horrors.  So my monitor has been DOA for almost a year.  I finally broke down and got the chassis repaired.  Got it home, and none of my boards appeared to fire up.

I finally broke down, took a desktop machine and an ArcadeVGA board, and the video on it came up just fine, so I figured maybe my Jamma Harness was screwed up.  Found that I got 12V, but not 5 volts, traced the wire back to the power supply, and got 5V there, then looked down and there's a fuse block.  1A fuse for the 12V, and a 5A fuse for the 5V, and the 5V one is blown.

So I went shopping with my wife, and got a 10 pack of fuses for each one, figuring that I would keep them in the cabinet should this ever happen again.  Get home, swap the fuses, plug in my SFII Hyper Fighting board, fires right up.  Plus in my 6-Slot Neo Geo, it comes up...sorta.  Unplugging the Jamma harness made the 5V line pop again.  Swap the fuse, verify that it comes up, turn the power supply off, plug in my CPS2 board and X-Men vs. Street Fighter.  Nothing.   I was fearing CPS2 Suicide because my battery has never been replaced, but I look down, and the 5A fuse is blown again.  Turn it off, swap the fuse, fire it up, the fuse blows immediately.

So - is a symptom of CPS2 suicide the blowing of that fuse on the power supply, or do I simply have the wrong fuse there?  I know if it's committed suicide I'm screwed unless I send it off to be Phoenixed (which I'd prefer not to do if I can).  If by some fluke I get it to fire up, I'm swapping that battery this weekend, labeling the date which I've done it, and swapping it yearly.  I really should be a battery holder in instead to make it easier.

Any ideas on this?

[Numbski]

Looks like I lied.  Neo Geo 6-Slot burns the fuse too - it just takes longer.  I left SFII hyper fighting going for over an hour last night, no problem.  The Neo Geo stayed up for maybe 10 minutes, and then the fuse went.  CPS2 goes immediately.

I'm very hesitant to move up to a stronger fuse here - typically speaking if you're blowing a fuse, something else is wrong.

[Numbski]

Okay, so I changed to using an 8 amp fuse on the 5v line, and it has stabilized.  So instead of blowing the fuse, on my X-men vs Street Fighter, I'm getting this.