> I believe the hard disk is probably dead.
>>> what brand? what size?
Quantum Fireball (not sure about the size I think about 1-2 Gig)
> The hard disk was partitioned with Drive 7
> and some of the partitions stopped being
> mountable before the machine failed.
>>> how long did it work before it did this?
We used it for years before having any problems with the HD.
> I can't find any bootable Apple CD's -
>>> can you borrow?
> although I should have some somewhere.
>>> what OS range would you want to try with?
I did find a Performa 631CD/6116CD On Screen Demo Disk - my dad used to be a
part time Apple Rep to stores that carried Performas. The disk has System
suitcase 7.5, System 7.5 Update 1.0, System Enabler 406, Finder 7.5.1 in the
System folder. It boots the 6300, but is rejected without as much as a
temporary Happy Mac in the 550.
>
> I've tried a couple of superbooter floppys
>
> as well as Apple's Network Access Disk without success.
>
Also found System 7.5 Disk Tools floopy - same symptoms as other bootable
floopies tried.
>
> Here's the symptoms.
>>> how are you powering on?
Switch on power switch, press power button on keyboard.
>>>> chimes or no?
> [ is machine doing its hardware check, hardware sensing whole system?}
Good Chimes on powerup.
I do get CoD when I press Command-Reset when the flashing disk icon is up.
Screen changes to black with Sad Mac icon hex numbers 00000000F and 0000000D
are under the Sad Mac.
> When I attach a zip drive
>>>>> asking the obvious, did you turn off power and hook it up cold
> before restarting?
Always powerdown before changing SCSI.
> or did you try to 'hot shoe' plug it in while the machine was powered
> on?
>
> (Universal System 7.5.5 folder
> built and tested on a Performa 6300),
>>> do you have that perf 6300 still?
Our Macs:
Performa 6300 CD
iMac - revision 'A'
eMac w/ 24x CD/RW drive
networking resources:
LocalTalk transceivers for the 6300, 550, DeskJet, Apple II GS and
AsanteTalk.
AssanteTalk bridges to iMac/eMac ethernet ports via crossover cable
(recently got the eMac and have not yet acquired ethernet hub). Internet is
dial-up on the iMac (eMac has no modem).
Best method for transfering files between machines remains 100MB Zip Disks.
>
> I can see that the disk is accessed in the Mac's scan of SCSI devices.
>>>> the hard disk? or the zip disk?
>>> you mean its icon shows up on the screen? how?
I hear the hard disk and zip disk spin.
>
> Non bootable CD's are ejected,
> as are floppies
> (after a brief happy mac).
> I tried to boot from a different device
>>> what device?
>
> with the hard disk removed, but that didn't work either.
>
>>>> no chimes? anything on the screen?
Tried booting from floppy & zip disk w/ hard disk removed - symptoms do not
change.
> how's the PRAM battery in this machine?
> is your RAM in solidly?
PRAM battery read 2 volts on multimeter - should be 4.5. Just tried with
PRAM battery from 6300 (measured at 4 volts), did not change symptoms.
> what about disassembling things on an antistatic work surface and
> unplugging and just letting the board 'drain' for a while, and beginning
> again meticulously with the standard checklist and protocols?
What makes an anti-static work surface. I ground myself while working on
computer parts, but I'm not familiar with 'draining' components.
It was also suggested off-list that I try the disk in an external case. I
did think of installing 550's HD in the 6300 (I am able to boot 6300 with
CDs and Zip Disks); however 6300 internal disk is IDE, 550 is SCSI - I have
no external case to try the disk in.
If I get this machine working, I want to upgrade ram (currently has 8 MB)
and add ethernet (LC PDS slot). I've also thought about the Presto Plus,
but I don't think I can justify that unless I find one used for a good
price.
Thanks for the help.
David Robarts
--
"Growth demands
a temporary surrender
of security."
--Gail Sheehy
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