Unusual RAM issue with my IIsi. — #11

Post #11 by Solvalou

Source Forum	68kMLA
Category	Hardware
Post Date	Sat, 26 Mar 2011 - 17:40
Original URL	https://68kmla.org/bb/threads/unusual-ram-issue-with-my-iisi.22523/

Post

I have noticed that it has no ROM SIMM installed. I actually have a spare at my friends (funny enough the one I just mentioned), i'm thinking that could be the possible cause for the chimes when any RAM is installed. Though in my experience from Mac's of old they usually they don't boot at all without a ROM SIMM, RAM or no RAM.

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Correct. If it boots at all, then there is ROM installed. The huge majority of IIsi's had the ROM soldered to the logic board and never used a ROM SIMM in the socket.

Ah that would explain why it didn't boot with one installed. I had tried anotherr PSU and it is still the same issue. I guess all that's left is to clean the contacts... :-/