Hi all amiga lovers,
I have an a4000 motherboard that has some strange problems.
I have detach all stuff not in case any longer.
I have old rom 3.0 and odd ramsey and or buster but have others it's only for test atm.
My working conditions:
CPU-Floppydrive (df0+df1)
CPU+Floppydrive (df0+df1)
Test of HDD an FDD floppyes operation was working too.
and with ofcourse a monitor so I can see something.
(CPU card test is a3200/a3400 and a3640 rev3.1)
Problem cases:
Case 1:
When I connect the a4000 keyboard, it gives me no boot
it just gives me grey screen and keyboard caps lock does not light up.
Case 2:
Another is when I attach to port 1 a mouse I can enter Amiga Early Startup Control but I can not use the mouse
Any clue what to do next?
So what advices are next to try out?
Would change of the 8520 chip help me out of these problems on u300 and u350 ?