I have a 1320 that gives a fatal error the majority of the time when printing. I thought it may have been due to the size of the jobs but upon testing it really doesn't seem to matter. Text, Acrobat, Graphics sometimes they'll print sometimes then end with a fatal error. Here are the symptoms:

I send the job to the printer via a Jetdirect 300x (external through parallel cable to printer)
The job light blinks on the printer.
The printer starts the print process. (rollers etc)
I hear what seems to be the paper pickup process. (clicking)

Right after the above step I get the fatal error lights, hitting Go to check secondary does nothing as the fatal error indicators stay lit.

The only thing left to do is to reset the printer and more often than not the error just repeats itself. I have checked the pickup roller and the paper path sensors that I can see, there are no issues with them.

Any tips on what to check next?
hp³£ÒŠ¹ÊÕφ–î}½â´ð  2010-3-31 21:33:43 
 Disconnect the parallel cable.
Power cycle the printer, (leave it off for at least 5 seconds before you turn it back on).
Push and release the Go button, a demo page should print.
If the demo page does not print then the Go button might not be working.
If you get a fatal error when printing the demo page, then press and hold the Go button, what is the secondary pattern? (flashing or solid)
If the demo page works then print the config page, start with the printer in ready status, press and hold Go till the yellow light comes on, release Go. (A supplies status page should also print)
The config page will list the last few event log entries, please post them.
If the config page works, then test the printer by attaching the parallel cable to a PC, or use a USB cable.