HP designjet 750c system error

I am receiving the following system errors when i turn my plotter on:

System error 06030B
System error 010030 00070B0F

(they are not happening at the same time)

Can anyone tell me what it means?

Fter a quick GOOGLE - HP help showed this answer to one of your problems: http://forums1.itrc.hp.com/service/f...hreadId=195456

says that the cartriges may be bad (at best) or the board has gone (at worst)

and you other error sounds worse: http://forums1.itrc.hp.com/service/f...hreadId=134828

the errors may be related...

Good luck!