My Amiga A1200 recently came back from a repairer after being rained on through a skylight and having a thorough refurbishment including re capping, replacing the broken RGB port and checking that everything was working again after being rained on and ending up covered with gunk. I didn’t actually see the state of the motherboard myself because I never managed to remove the RF shielding. This rusty shielding has now been removed.
Unfortunately, after setting up, then using my Amiga A1200 for only about two hours after these repairs, all of a sudden the screen went bright green!
At the time, the things that were attached to my Amiga were an 8Mb RAM expansion from Amigakit, an IDE extension cable and CF card, as well as a very old 1970s style Atari joystick and a Gotek which didn't have any USB stick plugged into it.
I soon found a thread on a forum about this green screen which said it was a RAM error. I followed their advice to disconnect as many things as possible. I unplugged the CF HDD replacement, but that didn’t work. I ended up by disabling the RAM expansion with a jumper, then removing the expansion altogether, but nothing I did would stop the green screen from being displayed! I didn't unplug the Gotek.
I’ve recently started attending meetings at a repairs workshop where they’ve mentioned surface mount technology and they’re even trying to repair an ancient looking toaster.
It seems that the worst case scenario is for me or someone else to open my Amiga A1200 case again, locate the RAM chips on the motherboard, desolder them, then replace them with working RAM chips, but I don’t know how I could check in advance that they’re working.
There may be more simple techniques for curing this problem. What should I do next?
