[Marc7]

I have a 7100/66 that won't recognize the hard drive. When I start up from the hard drive it shows the ? mark. When I use the original CD system disk that came with the machine one of two things happens. Either the machine starts up, but the hard drive does not show on the desk top or it gives the error message-Sorry, a system error occured "Finder" floating point coprocessor not installed. I changed out the hard drive, but still has the same problems. I would really appreciate any infor or suggestions.

[Walter J. Ferstl]

Marc,

assuming this is the only hard drive in your 7100, I would guess it might be an SCSI address fault.

Make sure that the drive has no address jumpers at all placed on the circuit board.
In SCSI terms, this means that the drive's SCSI ID is set to 0 (i.e., zero).

Also check that the power and the data cables of the drive are seated properly.

The CD-ROM drive in this type of Mac is usually set to SCSI ID 3 out of the factory.

Good luck,

Walter.

[Walter J. Ferstl]

Marc,

after having booted from the CD and the desktop having appeared, you could lauch Disk First Aid from the CD to see if the had drive will be recognized by this application. If so, you could use Drive Setup, also on the CD, to format the drive and install a new OS from CD.

Good luck,

Walter.

[Scotttheking]

Your machine may be dying.
The error message sounds like something on the motherboard is failing, and your hard drive may be end of life.
I had that problem with a drive after I used it for about 6 years.

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G3 400, 384, 12 + 75 GB
PM 8500 - 150, 48, 1 GB
PM 7100 - 66, 32, 700 MB
PM 6100 - 66, 40, 4.5 GB