Mac os x Tiger Invalid Memory

[q188r]

I used an apple hardware test Powerbook g4 -
Holding down the C key at reboot - It gave me the option of restarting in safe mode - and shutting down.
It also gave me these messages:
Error 1 loading default test font (Fonts\Geneva 10)
Error 1 loading Default control font (Fonts\Charcoal 12)
Invalid memory Access at
&SRR0 : 00060578 : &SrrI : 00003030
(although I don't think they are ampersands -they look kinda like ampersands but are a symbol i'm not familiar with)

Starting in Safe mode it kept blinking back and forth from the folder with a question mark and the mac icon.
After shutting down I restarted and looked at the cd - the cd has one Item - a pdf file which is written in several different languages and only a few pages long - Instructions on how to use it - what it does - but no english.

The specs of the computer are 12" G4 - matshitadvdruj835e dvd super drive
512 mb ram
80 gig hd

I have also have been having dvd burning issues - I've had the computer for 3 or 4 years and I think the burner is at the end of it's life
The burning may not be related but I don't know if someone has any ideas.

Thanks for help in advance