Null sign on start up

[glaureta]

what does it mean when you get a null sign on start up? any quick fixes? tried swapping out a couple of start up hard drives, but nothing but null.

 

[josephmccutchen]

what does it mean when you get a null sign on start up? any quick fixes? tried swapping out a couple of start up hard drives, but nothing but null.

Did you do any software updates before getting the null sign?

 

[TC400]

You got a picture?