dj_sudo Posted September 17, 2017 Share Posted September 17, 2017 I got a very dirty IIc locally. The initial memory test showed a bad RAM chip, which I've replaced. The self-test now reports "System OK," which is great! The only problem is that after replacing the chip, the keyboard (which worked before) now does nothing. No keys register, and the cursor sometimes either blinks VERY fast or shows an "alternate" character, a cross in reverse color, which isn't even supposed to be in the IIc's character set. Any thoughts? I've piggy-backed a keyboard encoder chip with no change. Maybe a bad character generator rom? Quote Link to comment Share on other sites More sharing options...
Osgeld Posted September 17, 2017 Share Posted September 17, 2017 if it worked before its probably a bad connection after you put it back together Quote Link to comment Share on other sites More sharing options...
spacecadet Posted September 17, 2017 Share Posted September 17, 2017 Clean and reseat the ribbon cable. Check all pins and the cable itself for damage. Quote Link to comment Share on other sites More sharing options...
Keatah Posted September 17, 2017 Share Posted September 17, 2017 Check for solder shorts in the area. Check the Keyboard ribbon-cable connector. Rock and reseat socketed chips. Is the replacement RAM chip the same speed and type? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.