A1200 Pointer Corruption

[tasmanian guy]

Easy fix, hot gun glue a heat sink on the Lisa chip. It is known issue and since it only occurs after the Amiga warms up, it is definitely heat related.
 
In the 1200 rack project, my lisa chip had a heat sink on it that was put there by a third party for this very reason!

[tasmanian guy]

@tasmanial_guy
 
Er, you might want to clarify the hot gun glue bit - using a normal hot glue gun isn't going to help your cooling *at all*, as the plastic glue is quite a good insulator. You need special heat conducting glue, or heatsinks with this special glue already applied. Normal glue, sticky pads and the likes are only going to make it worse...

You're right of course, I didn't get much thought, but with my 1200 rack they did use a type of glue (it looks like a hot gun glue) around the side to fasten the heat sink to the chip.
 
Anyway it is worth a try to try and fasten a heat sink to see if it does make any difference as it does sound like an overheating issue.