Yep ! There definitely is a self test mode for it.
Check out
http://www4.tpgi.com.au/users/mij/Au...agnostics.html
This document explains how to enter self test mode, and what the self test codes mean if you have a problem.
If there is any further information you need to add to this document, then please let me know, and I will amend/append it accordingly !
Cheers
Matt