SYSTEM ERROR 0603080000008

Its an error code to do with some resistor and the printheads...I have the same code and I'm trying to find more info too

I have look over the HP service manual and your 060308.... isn't shown. The manual jumps from 060305 to 060309. Hmmm. Could you have typed it in wrong? If not I would look at the items for 060 ETAL. Probably a bad printhead though as it is the most likely. I have shown a link below that you can get a free copy of the entire HP service manual for you mahine and walk through the processes to isolate the problem. Good luck and hope this helps you.

http://www.feedroller.com/Store/Service%20Manual/DESIGNJET%201050C,%201055CM%20Large%20Format%20Service%20Manual.pdf

first of all remove the networking cable n usb cable if connected,just connect the power cord n power on the printer n check,later u can connect the other cables