Amiga 3000 problems - please help!

[Unit21]

I got a ´broken´A3000 the other day...

When I power it up the screen is flashing like a christmas-tree.
I have seen a yellow screen a few times, but it is mostly the red one that flashes one or two times.
Then the machine resets and the insert disk screen shows up.
If I leave it like this it will run happily for hours...
But if I insert a disk or try to connect a harddrive to boot from it crashes 9 out of ten times.
Usually with a Guru-message beginning with 8 and ending with 4.

The Amiga has KS 3.1 and 2Mb chip RAM. That´s it.

Does it sound like a ROM-problem to you guys?!
Has anyone experienced the same?!

Btw, I have tried changing the 8520-chips and the Paula-chip with no luck.

Please help....  :-?

[Unit21]

First of all, yes, I have some Amiga experience.
I actually sell quite a few Amigas on Ebay every now and then, but they are all working... ;-)

This Amiga 3000 comes from a video store in Norway somewhere.
It came with a SIMMfonie SIMM-to-ZIP adapter, but this one broke in transport.
I can of course solder on the pins again, but I really don´t have the time..

The Amiga boots 1 out of 10 times. This time it will show the workbench-screen from f.ex. the OS3.1 Install disk.
It can stay like this for a long time, until I move the mouse or touch the keyboard.
It will then show Recoverable alert:  # 07000004
After this it will reset with Guru alert:  # 80000004

Then it will reboot again, and start with the red flashes.

Sometimes it will even show a ´suspend - reboot´ window while booting from Floppy;

   Df0: failed

Suspend      Reboot

It seems to me like this can be faulty ROMs, since it flashes red, but can it also be some kind of floppy-controller or another custom-chip?!

[Unit21]

The machine has two megs of chip RAM.
I take it that it won´t function properly with no fast RAM?!

Btw,
I plugged in an old 030 CPU card from and A4000. This makes the machine boot to workbench.
It lets me open files and such, but as soon as I try to drag the whole screen it crashes.

Guess I will try some other ROMs and some memory and see if this helps.
Or just get me a used Amiga 3000 mobo from the last Amiga store in Norway...

I´ll let you guys know how it works out.

[Unit21]

Tried it.
Didn´t work. Now it fails with memory mapping error or something.
I have decided to get a used Amiga 3000 off eBay or from the Amiga store over here in Norway.

Thanks for the help anyway...  ;-)