Hi Dennis, thanks for your input into this.
If I recall correctly from my experiments, the IIx ROM does exactly that in a IIci - gray screen - so I would rule out using the IIx ROM right away.
I tried the II ROM simply because all else had failed, without it in, the machine simple came up with a black screen rather than a grey one.
Did you try connecting the display to the onboard video and without the IIx ROM SIMM installed? That's an important test.
Yes I did. First I tried the display connected to the nubus video and then to the onboard video. The results were the same - both black screens, yet with the II ROM I got a grey screen from the onboard video.
When you say that the hard drive "spins up and starts working", does this mean that it started making sounds like it was loading something off of the drive?
No, the drive merely 'spins up' and starts working, it was not making the usual clicking noises as if it was accessing the disk to read information from it.
The test for OS-related death chime is to disconnect the HD and see if it still death chimes.
Unfortunately, the machine still death chimes with the HD and Floppy disconnected.
Also, does it make the normal startup chime at first?
There's no startup bong/chime.
The fact that your IIci makes sound and responds to the power button properly is evidence that your caps are still pretty good.
Well that would tie in with my visual inspection of the board. I just don't see any damage from leaking capacitors, I see no breaks in the connections and I see no evidence of the capacitors leaking or bulging - the capacitors look nice and straight.
As for the Mac II/IIx, if this was the source of your ROM SIMM, did you remember to put it back in there before turning it on? I think it'll do something like you described without that in there.
Yes, the Mac II was failing to start before I pulled the ROM simm out to try in the IIci.
I will double check all of this again just to make sure what I've said here is correct from memory. The use of the ROM simm is just a bit of a red herring I think as it was only tried after all the other attempts to get it started were tried. What I found curious about the ROM simm being in there was the change of screen colour from black to grey, but again from what you've said that's fairly inconsequential as things go.
Putting the use of the ROM simm to one side, as it stands at the moment, whatever I do or whatever I try results in the chimes of death and a black screen. One thing I did notice when I inspected the board were a couple of bent over pins on the processor, they wern't touching each other and the connections seemed intact and undamaged, so I think mentally I put it to one side. But I guess that might be significant? I should re-inspect that area for any other damage I think.