I have an SE/30 here that randomly Checkerboards/SimasiMacs (if it hasn't been on for a while, it's pretty much guaranteed to be "fine" and boot up though).
Here's a picture of one time it's done it:
https://i.imgur.com/6kjM9nh.jpg
Sometimes there are patterns that appear closer to SimasiMacs rather than just checkerboards.
It seems to most frequently happen if I turn it off and back on again within a relatively short period of time. Sometimes it clears and continues booting (kind of). What I mean by that is that it'll go to the gray screen with a mouse cursor then hang for a bit. After a few seconds, it'll show the ROM-inator II splash and then go to the blinking floppy w/ a question mark instead of booting off of the SCSI disk. Is there anything in particular this points to (besides just a recap)?
EDIT: Oh, it'll also boot into System 6.0.8, 7.1, A/UX etc. but not 7.5.x. 7.5.x gets stuck at the Welcome to Macintosh screen.
Here's a picture of one time it's done it:
https://i.imgur.com/6kjM9nh.jpg
Sometimes there are patterns that appear closer to SimasiMacs rather than just checkerboards.
It seems to most frequently happen if I turn it off and back on again within a relatively short period of time. Sometimes it clears and continues booting (kind of). What I mean by that is that it'll go to the gray screen with a mouse cursor then hang for a bit. After a few seconds, it'll show the ROM-inator II splash and then go to the blinking floppy w/ a question mark instead of booting off of the SCSI disk. Is there anything in particular this points to (besides just a recap)?
EDIT: Oh, it'll also boot into System 6.0.8, 7.1, A/UX etc. but not 7.5.x. 7.5.x gets stuck at the Welcome to Macintosh screen.
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