Lisa startup failure

[aihk]

Lisa keeps making a clicking sound when it turns on, and the rubbish screen keeps jumping. I have an oscilloscope and a multimeter. Where should I start to solve the problem?

 

[aihk]

Can lisa boot without memory and IO board? I mean can I see normal picture with only CPU board?

 

[bmwcyclist]

I don’t believe you can boot with no I/O board.

 

[bmwcyclist]

Those are some interesting boards you have, are you building your own boards?

 

[ClassicComputing.com]

Can lisa boot without memory and IO board? I mean can I see normal picture with only CPU board?

Hi, I'm pretty sure you cannot boot any computer without RAM. I also don't think the Lisa can boot without any, so it needs at least one 512K board. The Lisa does perform a POST at startup, which checks for memory.


Best,

David Greelish
Computer Historian

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