Problem Booting redhat machine

[Andrew.Bridgeman at corusgroup.com]

I am currently having a problem with 4 Hp proliant servers that since
Friday when they where powered off will not come back up. The machines
power, disk and network are all fine but when i power the machine up i do
not get anything appear on the screen at all , i have tried two different
monitors that i know work fine but i do not even get anything on the screen
not even the proliant screens on initial boot , let alone the linux boot
sequence.

Has anybody seen this before, what else can i check for and what  can i do
get it back up and running?

Regards

[IMAGE](Embedded image moved to file: pic20945.jpg)
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