Apple II

I picked up an Apple IIc for $30 which was not in great shape, but I think I've got everything working on it.  The upper bank of memory had 4 bad DRAM's which I 've replaced, I upgraded it to the 4X ROM, cleaned the disk head, fixed the volume control, and got the keyboard cleaned up and working decently.  It was so grimy when I got it, but lots of cleaning and some retrobrighting and it looks pretty decent now.  I didn't get all the yellow removed so it would look white like the bottom, but it looks good.

One of my Rev 7 ][+ bench boards recently started doing somethign rather odd: When a (known good) Disk ][ card is installed in Slot 7, the system works as expected, but if the same card (tested on other machines) in installed in slot 6 or a lower slot, the system exhibits random errors and crashes. The video output becomes distorted (dims, flickers, oscillates), and/or it tries to boot and crashes, or it simply hangs with a wavy video output. 

I only noticed this because I had to load CP/M for a test, and CP/M needs to run from slot 6...

Antoher day another broken IIC ;)

I bought a european version - It boots and gives me a "System OK" with Rom4x but i cant use the keyboard.

it reads the keys multiple times - like if i press "W" it prints "WWWWWWWWWWWWWWWW" ... 

I reseated all ICs and sprayed with contact cleaner. I swapped the original 255 Rom and checked all the traces around the keyboard encoder and so on...

oh and tried another keyboard...

any ideas? easy fix? 

rgds Dario

So I have been around for quite a while in the Apple II world and have worked for dealers when I was a young pup in college and I have never seen one of these.  Did I just miss out, or is this a "modern day"  creation?