Last month I powered up my A1200 after not doing so for 2 years. It didnt boot with different shades gray, etc and never reaching the Amiga boot screen. Had to remove and re-seat the Kickstart ROMs 2 times to get going.
I think I will replace sockets with high quality machined sockets.
I dont think there is a obvious answer for your situation, you will need to go through a check list, crossing off possible options one by one. . recapping is a excellent first step.
