I've just bought a used Amiga 500, which was supposed to be working. However, when I power it up, it gives me a green screen and the power LED blinks (a cycle of 10 short blinks and then 1 long). It had been pretty carelessly packed, so that it would move around in the box quite a bit if shaken or dropped, which it most likely has been.
I've tried a number of things to no avail:
· Removed the RAM expansion and replacing it with one known to be working.
· Lifted and reseated all chips (Fat Agnus, the two CIA's, Denise, Paula, Gary, the ROM) except the CPU.
· Cleaned the motherboard with isopropyl alcohol (although it seemed to be in excellent condition).
When turned on for a couple of hours, the CPU, Denise, Paula, Fat Agnus and the two CIA's become warm. The RAM chips, the ROM and Gary remain "cold".
I know that a green screen officially means that something is wrong with the chip RAM, but I read somewhere that it might as well mean that something is wrong somewhere on the data bus. Does the fact that some of the chips remain cold indicate an error on one of the buses?
Any suggestions?
