Amiga 3000 problems - please help!

[Neo]

Thats right the first thing to check is that all jumpers are properly set. Ensure that no jumper is set to external if no accelerator is installed. Also check the 1 or 4 Meg jumper is properly set. I personally don't think lack of fastram is the problem, cause I almost certain I've run an A3000 without fastram.

As for the colors. These are what they usually mean
RED - ROM Checksum failure.
YELLOW - Daughter board not installed or bad.

The YELLOW stuff is a quite anoying part with the A3000. That all parts have to be assembled to have the Amiga running. A good idea when messing around in your A3000 is to dismount the drive bay from the powersupply. This way you will be able to reach the motherboard while still be able to power it on.

As for my knowledge of the 3000 series is that they can take quite alot. I've got an A3000T motherboard from a computer that looked like it had been run over by a truck. It had been shortened by about one feet and looked like a banana. There was only some small problems with it. One was that Fat Agnus fell out of it's socket if the motherboard was turned over. Second problem was that one of the PAL chips was not operating properly. Replacing the PAL chip and a socket fixed the board.

If you are unlucky it could be a PAL chip that has gone defect. They are programmable chips and are very sensitive and has sometimes the bad habit of just dying. If so you have to get a new chip and find someone with a PAL-programmer to program it. Or you just buy it from an Amiga dealer.