A4000 boot error colours - Magenta?

[Boot_WB]

Hi people,

Still fighting my A4000.
Occasionally it boots, and I'm fairly sure now it's to do with the CPU connector. I've got the voltages up nicely, so that should be ok.
I've cleaned and re-cleaned the CPU connector but it's so bloomin' difficult to get at, I still can't be sure it's clean.

Anyhoo, the symptom at the moment is a bright magenta screen on a cold boot. I know the CPU is basically working because if I remove the chip RAM, then it sure enough boots to a green screen.
Very occasionally I get a white screen.
Quite often I get nothing at all - just a dark grey screen as though the CPU is doing nothing.

I've tried with both the original 030 module and the CS-PPC, same thing on both.

All this time the Caps Lock light works as it should, no error codes or anything there.

Anyone got any ideas? Thanks if so!

Hi Ian,

Have you tried pulling & cleaning the ROMs, and checking for any broken legs? May also be worth checking the DIL socket solder joints to the motherboard also.

 Purple         Not an "official" color, but may be caused by
                              bad ROMs.

http://web.archive.org/web/20081018170130/http://home.nikocity.de/rs/A4k-HW3.html

also

http://www.amiga.org/forums/showthread.php?t=35177