Wolfgang Gehl schrieb am Donnerstag, 4. November 2021 um 19:14:18 UTC+1:
> it seems you're right and the onboard SCSI is not working. My point is
> to get past 262 in service mode, just to make sure, the system continues
> POST even without a working SCSI subsystem.
>
> Since there is no monitor and no video card you might as well just pull
> the keyboard off.
>
> Give your system a boot device and connect the floppy drive. Disconnect
> the SCSI cable and tell us what happens.
With floppy connected, and a random or without a diskette in the drive, with or without keyboard, the system finally hangs at 262 when set to maintainance mode.
This is the full error code list. I had to use my phone's slow motion video recording function to capture the quick ones.
Some look pretty fatal to me, indicating some serious planar failures, if they're not exaggerating:
211 IPL ROM CRC comparison error (irrecoverable)
215 A low voltage condition is present (irrecoverable)
218 RAM POST is looking for good memory
21c L2 cache is not detected (That's ok, there is none on this specific model)
219 RAM POST bit map is being generated
220 IPL control block is being initialized
216 IPL ROM code being uncompressed into memory
290 IOCC POST error (irrecoverable)
288 Adapter card slots being queried
291 Standard I/O POST running
283 Serial port POST executing
272 Tablet Port POST
271 Mouse and Mouse port POST
219 RAM POST bit map is being generated
291 Standard I/O POST running
262 Keyboard not detected as being connected to the system's keyboard port