Screen blank on boot up

I have a SunFire V490

Recently when the server is rebooted the screen goes blank from when the CDE is shutdown to when it is started up again.

Has anyone got any ideas what might be causing this?

I've had a quick look in messages but can't find anything in there. I've had a look at eeprom:

eeprom | grep device
output-device=ttya
input-device=ttya

From what I have read this is valid.

It does run through a KVM but I have also tried it with a monitor and keyboard plugged directly in but got the same problem.

Many thanks
Paul.

as you can see in your eeprom output, your output points to your serial port and not on your screen.

have you changed something? if you want to have output on your screen then set the variable output-device=screen and input-device=keyboard

before you change something check if your alias screen is pointing to a graphiccard.

don't remember how to do this on solaris but on obp level you can type this:

ok devalias screen

In the end I set the eeprom parameters to output-device=screen and input-device=keyboard and that did the trick.

Not sure how they'd been set to ttya but they may well have always been like that. It's not a server we reboot very often!

Thanks
Paul