[teszeract]

Specs:
G4566MHz
768 MB SDRAM
OS X 10.3.4

This mac only boots into this screen shown. Repeated resets with and without cables. After about 6-7 resets the mac will finally boot normally. I cannot type anything at the prompt. Any ideas?

[P]

Originally posted by teszeract:
Specs:
G4566MHz
768 MB SDRAM
OS X 10.3.4

This mac only boots into this screen shown. Repeated resets with and without cables. After about 6-7 resets the mac will finally boot normally. I cannot type anything at the prompt. Any ideas?

Looks like a hardware fault. Also, 566 MHz seems like an odd clockspeed - did you overclock something? Try clocking it down.

[Detrius]

There are two areas that I have seen that can cause these: hard drive, and memory.

If you disconnect the ATA cable from the hard drive, and this goes away, that's probably what is causing it.

Memory is trickier. This could be the RAM, logic board, or processor (i.e. anything in between the actual ALU and the RAM). Most often, this is caused by bad RAM. If you can boot from the Apple Hardware Test CD that came with the machine, that can be helpful.

[teszeract]

Thanks. Its actually 466mhz. Whoops.

I just recalled that we added a second video card about a month ago. Perhaps that?

[Detrius]

Originally posted by teszeract:
Thanks. Its actually 466mhz. Whoops.

I just recalled that we added a second video card about a month ago. Perhaps that?

Theoretically--it's plugged into the logic board--but not likely, as it isn't touched until way later.

Clearly you have more than one RAM module. Did you try pulling any of them out? Can you boot into the Apple Hardware test? The fact that there is a stack underflow error implies pretty heavily that this is at least somewhat memory related. Pull RAM!