Hi Sega; I am not a 1571 expert but the errors will be very similar to 1541's and we do have this http://www.commodore.ca/manuals/Tips/1541_tips.htm troubleshooting guide. If I had to guess, I would say it is reading header information but then failing on the data load which might be an alignment ...

I have a Commodore 1571 disk drive for my C=128. GEOS won't boot. It worked fine earlier yesterday. I get the error in the screenshot below. Also a diskette that worked fine before doesn't anymore. I typed LOAD"*",8,1 just like it said on the diskette and it says ?FILE NOT FOUND ERROR. Could I have ...