I used aptitude to upgrade a headless server from Debian stable to Debian
testing. The upgrade did not generate any error messages, but when I
rebooted I could not ssh into the box (connection refused) nor do I get any
output on a monitor I attached to the box (no signal). Apache does not
appear to be running either on the box (could not connect to the box). I
can successfully ping the box.

Any suggestions on how to fix this this server would be greatly appreciated!

Thanks,

Mark