console no responding to key in.

[Jessie Xu]

To whom it concerns:
 
I am an unix administrator, am responsible for our company's unix
servers: there are some running FreeBSD (ver 4.10, 4.11, etc).
We I tried to connect to the console by connecting a LCD & keyboard. I
found some consoles are responding the key typing, some are just like a
dead session - no responding to key typing at all. 
 
I must fix the problem since I need console login with root. Any insight
on this? thanks. 
Our machines are Dell PowerEdge 2650 (2U rack mountable) , come with
Video port, PS2 keyboard/Mouse ports, and two Serial ports. -- I also
tried the serial ports for console access, no lucky.
 
My question is: why some machines' LCD console is hang while some are
good. the consoles with hang problem show Unix error message on the
console, but I don't think this could cause the console hang. 
   
I also checked the BIOS, the good ones have same setting wit bad ones.
 
Jessie Xu
Unix Administrator
jessie.xu at cryptologic.com
desk phone: 416 545 1453 x 5618
Skype: Jessie.xu972