amiga 1200 green screen on power on

[soviet]

Hi guys, a friend of mine asked me if i can fix an amiga 1200 that he got recently.
The motherboard is a 1200 rev 2b motherboard.

Testing the bare motherboard only, no accelerator or anything just monitor and power (the psu is an atx psu and is working on my 1200).
I always got a green screen.

Any tips on fixing this are welcome !.


Using the diagroms i got this:


small video showing the colors and serial output from diagrom (no addons only base motherboard):
https://www.youtube.com/watch?v=Km6aRZVArGA&feature=youtu.be



then.
inserting a fast ram expansion got me other random results tried just turning on pressing left mouse button and right mouse button:
after this the test get stuck.



This means that i have to replace the chipram on the board ?, or could be other issues?

[Chucky]

memoryissues does NOT need to be a Memorychip being bad.  it can be so much more.

1.2.1 sadly does not handle addresserrors..   1.3 beta does.



btw kudos using a real terminal.  RESPECT!

[soviet]

memoryissues does NOT need to be a Memorychip being bad.  it can be so much more.

1.2.1 sadly does not handle addresserrors..   1.3 beta does.



btw kudos using a real terminal.  RESPECT!

Thanks !, love old terminals.
Also is possible to get the 1.3 beta test rom dumps ?.

[Chucky]

www.diagrom.com    just download the "daily" version

[magnetic]

that terminal display is pretty cool