Ah .. E25k I'm not familiar, we don't have that kind resources here to maintain such an animal in our 40+ server zoo, pity tho.
But yes Solarius,
The older servers use PS2 connector keyboards at the console, when you remove and replace the connector it will send the server crashing straight down to ok prompt.
I know that the newer servers all use USB keyboards, but I've not tried this method with USB keyboard yet