P570 error

Good afternoon AIX'ers,
I have a P570 running AIX 5.3 TL4 SP2 that the led stops at B181F23E

B181F23E There is a mismatch between the number of nodes present and the
type of SMP cable being used

This server was running just fine till today, no as hard as it is to
hear.....no one is claiming any changes to the server.

What cable are they talking about? Anyone else have this before?

Thanks
Vince