> Date: Sun, 22 Jul 2001 20:43:15 -0400
> Subject: Re: 7200 problem?
> From: Tim Collier <[EMAIL PROTECTED]>
>
> on 07/22/2001 06:10 PM, Gene Osburn at [EMAIL PROTECTED] wrote:
>
> > Recently acquired a 7200/90 that doesn't want to work. All internal
> > cables, connections and cords appear fine, but I get nothing after the
> > startup chime - no video signal, not even a flicker on the monitor.
> > Power supply seems to be powering everything up, but nothing happens.
> > Changed PRAM battery, just in case - nothing. Swapped out logic board -
> > no joy. The unit doesn't even seem to be attempting to find a valid
> > system folder to load: Disk Tools floppy inserted at startup - nothing;
> > System Software CD-ROM and four-finger salute - the same. RAM DIMMs
> > (two 16s from my 8600) are good....in fact, I'm reasonably sure that
> > everything I've installed/tested is OK, but still NOTHING! I'm stumped.
> > Can anybody give me a clue...?
>
> I recently had the exact same problem. This happened after I added VRAM
> sticks. My 7200 came with 2 megabyes of vram (two slots empty) I added two
> more and when I booted up, I got the behavior that you just described. I
> took the vram sticks back out and tried various methods of putting them back
> in....I guess I didn't seat one of the new ones properly? Anyway, after a
> bit if fiddling, my display came back.
> So, try reseating your vram....it's worth a shot.
>
>
>
> Date: Sun, 22 Jul 2001 20:40:32 -0700
> From: Eugene Gierson <[EMAIL PROTECTED]>
> Subject: Re: 7200 problem?
>
> Try zapping the pram, and try zapping it for about 10 chimes.
> Might help.
>
> Also the CUDA (?is that the right name?) on the motherboard might need
> to be reset.
To Tim and E. G., and any other curious parties -
Got it working. Wasn't the VRAM (it's only using the 1 MB onboard VRAM,
no DIMMs installed), but it WAS a DIMM that the 7200 apparently doesn't
like - a 1 MB L2 cache DIMM that has worked perfectly in two other
Macs...go figure! Hope I can find a cache DIMM that WILL work with this
mobo - makes a significant difference on these 601 units.
Resetting the CUDA and zapping PRAM are SOP solutions tried before
hollering for help; couldn't zap the PRAM, because that's invoked during
the startup process, which wasn't happening....
--
Gene, a.k.a. G-Man
Common sense isn't....
--
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