The configuration parameters that may prevent the
diagnostics from accessing the adapter include:

Interrupt level
Memory size & location
Registers location
I/O port address

A common problem is a BIOS configuration setting that
attempts to shadow memory addresses in use by the
adapter, or a memory manager that has not been configured to 
exclude the memory region in use by the adapter.

The access problem may also be a result of a hardware
failure.
 
The status lights on the adapter bracket can help
you determine what the adapter is doing. These status lights
are explained in the booklet that came with your adapter.
