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It has been fixed! Huge kudos to Baptiste Hobbé from AnalogThinker for doing the hard work and finding all the faults! So here is what Baptiste told me he found. He said ultimately there were two separate faults at work causing two very different symptoms. The First issue was the super...

Well it's not U8 as I've replaced U8 with a chip from a spares board and it does exactly the same thing. So something new I just noticed is that the 1541 drive spins forever (without ever finishing) if it's hooked up to the c64 serial port even when the c64 is otherwise completely unplugged...

Hi, Nope tbh I wasn't sure what else to try so I have sent the boards to Amiga of Rochester for his expert diagnosis/repair. Last time I spoke with him he thinks the 550 is fixable but is unsure as to what is going on with the color classic.

Diagnostic Cartridge came in and it doesn't find any faults I'm afraid :/ I did notice something while I was testing though. If I leave a serial cable hooked up to a 1541 drive and power on the c64 the drive spins forever. If I then unplug the drive and put in a cartridge I get the super fast...

I'm thinking of getting a diagnostic cartridge and see if it points out a failed component. The old dead test cart I have seems to think everything is fine including the CIA. That said I only let it run a short while; maybe I should see if they start to drift if I leave it running for a while.

Same game cartridge worked fine in another c64 and couldn't load a floppy disk to test as the drive just kept spinning when attached to this machine. Same drive attached to the other c64 worked fine. Very peculiar.

Well I've tried to swapped the CIAs (from one socket to the other) and it seems the same. How would I check the 60Hz signal please? I know the power supply I have is good as it's brand new and the multimeter shows the right voltage. It also works on another breadbin just fine.

Hi there, Between parts for my various other projects I decided to boot up one of my C64s and verify that a disk drive I'm about to sell is still working. Well the good news is the drive is working the bad news is that the C64 has developed a couple bizarre flaws. 1) The disk drive was...

I have two working boards (another CC and another 550) that work fine in the same chassis so I don't think that's the issue. I also have two other chassis and they all behave the same way, I'll be recapping the analog board on at least one of these chassis this weekend though so I'll certainly...

I was chatting with Amiga of Rochester on Facebook today about my board issues and he mentioned that both the CC and the 550 can be test run without capacitors. This is the first I've heard of such a thing, anyone else heard of this?

I don't have any real magnification I'm afraid beyond a simple digital magnifier but I don't think the edge connector on this board has any issue. It looks intact.

Good Evening, So I've been picking up a few systems locally and wanted to start recapping them for either my personal collection or to sell/trade. I've had a number of successes including two Mac Classics, a Classic II, and a Color Classic. All were "working" before the recap in that they at...

Well shoot, good information to know though. thanks!

Shoot, I had hoped I lucked out and got a SCSI Zip drive but it sounds like I need to go hunting again. Thanks for your help! Much appreciated!

Would something like this work to convert it to something Mac compatible? (From Ebay 50pin SCSI-2 Male Plug to DB25 SCSI-1 Female Jack Adapter)

A bit more research and I found this adapter for PCMCIA (see below) So you're saying that port on the back and is meant for a HD-50 SCSI 2 cable. Do you happen to know if they made a HD-50 SCSI 2 cable that could connect to a standard Macintosh SCSI port? I was hoping I could use this drive...

It does not look like a parallel port to me. Reading up on some forms people suggest it's a PCMCIA SCSI adapter port. Wondering if there were any adaptors out there that could take it to a regular mac SCSI instead of PCMCIA?

Hi, Just trying to verify an assumption on my part; Is the port on the back of this Zip 250 drive for SCSI? I can't find any indication on the drive itself that it supports SCSI but I can't think what else this port would be for if not for SCSI. Is anyone able to shed some light please?

Well shoot... Put in the new chip and the machine boots up! BUT now the caps lock key light is always on and the board is completely unresponsive. Wondering if it's a cap issue or something else, any ideas? Note: a few googles suggested replacing Q2 but that made no difference. Edit: I should...

Well I'm not 100% certain but I think I may have a different issue. I went ahead and re-flowed the solder joints on the board where the capacitors are and tried plugging in the keyboard to the logic board. No difference. I decided to pull out the multi-meter again and check all the capacitors...