Yeah I tried a radius 24 and it hangs on the radius splash screen.You sure your graphics card is ok? Do you have a different one to test with?
That's what I was thinking, it is passing RAM tests and chiming. How much RAM is installed?Try the RAM in one bank at a time? Although I'd expect a sadmac... ROM is running, passing checksum...
How long have you left it, the ? Takes quite a while with no floppy drive connected, is there one?
Cough...would need to know just what in the startup sequence there is going on between those times...and I don't know that nearly intimately enough.
Understanding you've tried both, but just in case you or others don't realise, it's worth sticking with a stock ROM when troubleshooting because the BMOW ROM doesn't do the memory test.bmow rom simm
Boot Screen
The familiar gray boot screen, or "question-floppy screen" as I like to call it, is set up at $400464. QuickDraw is initialized, the screen is again cleared to black (this is probably redundant). The arrow cursor is setup, but not shown, at $40047C. A large, rounded rectangle is drawn in 50% gray.
The VIAs have already been brought up and tested by the rom at that point, I was thinking regarding any interrupt triggers. I think I might be getting mixed up with the mouse on older macs when it was more involved with the VIA.ADB, Sound and SCSI come after the grey boot screen appears - so I think @Phipli is right in suggesting looking at ADB and VIA circuits next.
2. On machines with expansion slots, the initialization code initializes the Slot Manager.
The Slot Manager then initializes any installed cards by executing the primary
initialization code in each card’s declaration ROM. Video expansion cards, including
built-in video, initialize themselves by determining the type of connected monitor,
and then set the display to 1 bit per pixel, and display a gray screen (alternating black
and white dots).
3. The initialization code initializes the Vertical Retrace Manager and Gestalt Manager.
ROM drivers for all built-in functionality are installed in the unit table and initialized.
The initialization code initializes the Apple Desktop Bus (ADB) Manager that then
initializes each ADB device. The initialization code initializes the Sound Manager and
SCSI Manager.