Post by Dragget on Jan 22, 2016 23:04:48 GMT
I have recently unpacked all my old Commodore gear from storage and started testing it to see what works and decide what to keep and what to get rid of. (I have parts of three different 128 systems, plus a bunch of games and other programs.) I'm getting ready to list one of the Commodore 128s for sale, and plan to keep the 128DCR and possibly the other 128, but I've encountered a problem with the disk drive and was hoping someone here might be able to point me in the right direction as to what could be the issue.
When I turn on the power, I get the copyright message, but the machine hangs and never displays a READY prompt. The red light on the internal disk drive is blinking slowly, and the motor is spinning.
I found some troubleshooting information here: personalpages.tds.net/~rcarlsen/cbm/1571/1571diag.txt
Specifically, I found the following that might be relevant:
The problem is, I can't seem to find anything labeled U3 on my board (probably the troubleshooting info is for a discrete disk drive unit) nor can I locate any chip with a M2128 or TMM2016 label on it. Accordingly, I thought I'd post here and see if maybe someone more familiar with troubleshooting these could point me in the right direction. Below is a link to a Photobucket album with detailed pictures of the motherboard and disk drive assembly for reference.
C128DCR Motherboard Pics
Any pointers or suggestions anyone might have would be greatly appreciated.
Thanks in advance!
When I turn on the power, I get the copyright message, but the machine hangs and never displays a READY prompt. The red light on the internal disk drive is blinking slowly, and the motor is spinning.
I found some troubleshooting information here: personalpages.tds.net/~rcarlsen/cbm/1571/1571diag.txt
Specifically, I found the following that might be relevant:
U3 SRAM M2128-xx or TMM2016
When powered up, green LED flashes once per second continuously. No drive
access, locks up computer.
When powered up, green LED flashes once per second continuously. No drive
access, locks up computer.
The problem is, I can't seem to find anything labeled U3 on my board (probably the troubleshooting info is for a discrete disk drive unit) nor can I locate any chip with a M2128 or TMM2016 label on it. Accordingly, I thought I'd post here and see if maybe someone more familiar with troubleshooting these could point me in the right direction. Below is a link to a Photobucket album with detailed pictures of the motherboard and disk drive assembly for reference.
C128DCR Motherboard Pics
Any pointers or suggestions anyone might have would be greatly appreciated.
Thanks in advance!
