TS3500 3584 error 4400 hardware error messages

Hello - I seem to be getting this error as well as Node error - not covered by IBM on call home - but was still coneted and IBM said node error nothing more..

ASC/ASCQ
4400 ( hardware Error )

HEC/HECQ
Not Defined

Object# 72 Object Error: FFFE
Object#73 Object Error: 001

and then the below

ASC/ASCQ
4400 ( hardware Error )

HEC/HECQ
CA87 ( Call Home Failed - ISP connect failed )

Object#31 Object Error: 0000

and then this one below

ASC/ASCQ
4400 ( hardware Error )

HEC/HECQ
CCCA ( memory or stack error detected )

Object#05 Object Error: 0500


Has anybody got an idea on what could be causing this problem or what is needed to correct...?

The library has been rebooted and seems to be working again....but not certain for how long..?