Looking for a Color Classic Logic Board...

[Bill.Canfield]

...or someone who know's how to repair the SCSI interface IC.

I have acquired a color classic about a year ago. Since then, I have only been able to boot into it once. The CC will not recognize the internal hard drive.

I've tried swapping with another 80MB SCSI HD, and booted with the install disk, but the CC wont recognize the HD. I tried terminating the SCSI port on the rear of the machine... which seemed to allow the CC to recognize the HD. The CC was able to recognize the HD and it allowed me to begin installing System 7, but after about an hour the machine (I haven't been able to recreate this scenario since).

I've replaced the PRAM battery, which didn't help my situation at all... and I have also tried blowing out the logic board too.

After all of this, I believe that my SCSI interface chip is bad... but I don't have any experience soldering on a double sided PCB.

Does anybody have any tips on how I could/should remedy this situation?

 

[beachycove]

The first thing to say is that termination of the scsi bus would need to be done on the internal drive itself, rather than externally on the back of the machine. Some of these older drives were terminated automatically, while on others there is a jumper that needs to be installed on pins generally marked TE. It is possible that the drive has failed, but it sounds to me more like you have not got the termination right. That would be the place to start.

The second thing is to ask whether the new drive installed was Apple-branded (basically, does it have an Apple logo on it)? The default installer will not work with a drive that does not have Apple ROMS (though there are workarounds).

Let us know and we can talk you through the process.