I have a sunblade 2500 that fails to boot. It will start to boot, show the Openboot copyright info, and then stall showing "OS-IO". The system will not continue past this, but CAN be brought to an ok> prompt by stop-A. I have set diag-switch? to true and diag-level to max, but the stall happens so early in the boot, that they dump nothing additional at all.
Troubleshooting help appreciated. Is this a Motherboard issue?