HP Pro 4300 C9H70UT C9H70UT#ABA manual Drivers and Software . Check

Table 42. Numerical printer messages (continued)

Message	Description	Action
49.XXXX	A critical firmware error has	1. Press CANCEL JOB to clear
PRINTER ERROR	occurred that caused the	the print job from the printer
To continue turn off then on	processor on the formatter to	memory.
	abort the operation.	2. Turn the printer off and then
		on.
	This type of error can be caused	3. Go to htpp://www.hp.com/
	by invalid print commands,	support/LJ4200 or htpp://
	corrupt data, or invalid operations.	www.hp.com/support/
		LJ4300. Select Download
	In some instances, electrical	Drivers and Software. Check
	noise in the cable can corrupt	for the latest firmware image
	data during transmission to the	version at the bottom of the
	printer. Other causes include	page. If this firmware image
	poor-quality parallel cables, poor	is newer than the one
	connections, or specific	installed on your printer and
	applications.	your printer can receive a
		firmware update, download
	Sometimes, the formatter itself is	the newer firmware upgrade.
	at fault, which is usually indicated	Not all HP LaseJet 4200/
	by a 79 SERVICE ERROR.	4300 printers can receive
		firmware upgrades.
		4. Try printing a job from a
		different software program. If
		the job prints, go back to the
		first program and try printing
		a different file. If the message
		appears only with a certain
		software program or print job,
		contact the software vendor
		for assistance.
		5. If the message persists when
		using different software
		programs and attempting
		specific print jobs, disconnect
		all cables that connect the
		printer to the network or a
		computer.
		6. Turn the printer off.
		7. Remove all memory DIMMs
		or third-party DIMMs from the
		printer. (Do not remove the
		firmware DIMM in slot J1.)
		See “Firmware DIMM” on
		page 160.
		8. Remove all of the
		EIO devices from the printer.
		9. Turn the printer on.
		10. If the error message
		disappears, reinstall
		each DIMM and EIO device
		individually, making sure to
		turn the printer power off and
		then on again as you install
		each device. To replace
		a DIMM, see figure 98 on
		page 160.

Q2431-90912 Chapter 7 Troubleshooting 283