Apple II

Recently one of my 'IWMless' beta testers ran into a problem with his Apple IIc and needed a memory test program. Since the machine would refuse to boot ("Check Disk Drive" error message), the best way is to remove the firmware ROM (always socketed) and plug in an EPROM with a memory test.

Hello, first time poster here! I had a stash of Disk II Drives that I have been fixing up and am down to one more, but cannot figure out the issue. The Disk II Analog Card had a faulty 74LS125 which has been changed out, but it will still not read any disks. However, when I insert a different, known working analog card, it reads fine, so I know the head is okay. I have tested each resistor, transistor, diode, and capacitor but still cannot figure it out. I have also changed out each IC chip with working ones with no avail.

Can I fix my Macintosh LC475's Video, Recap It AND then Overclock it? High stakes!My vintage Mac and LC475 has poor video and on top of this it's capacitors are ALL leaking, causing damage to the machine! So we need to get into this machine urgently, to get those caps replaced and then find a fix for its ailing video output! Oh, and for good measure, we'll "overclock" it from 25MHz to 40MHz!

I've got an Apple IIe that had started to misbehave, culminating with it giving up entirely.

It had been working fine. I'd previously swapped out the keyboard Rom as that had given up the ghost, and there had also been an issue with the PAL encoder chip (the name of which escapes me now, but was a swap out replacement).

I had it out today as part of an exhibition, and it had been sitting there running Pac-Man. I noticed the machine had hung and restarted it. No problem, it came right back up, but after a while it stopped again.