HP Official Troubleshooting Guide for Printer Models Including C3941A

Figure 7-3

			Heating Element Resistance Check
Table 7-4
			Service and Error Messages (Continued 2 of 3 )
	LEDs		Description	Recommended Action
		Beam Error. There are a number of causes		1. Power-cycle the printer by unplugging the printer
		for this error, and some of the causes may		and plugging it back in.
		be transient. (They may disappear.)		2. Make certain the Laser/Scanner Assembly is
				correctly seated on the printer chassis.
				3. Replace the Laser/Scanner cable (J208 on the DC
				Controller).
				4. Replace the Laser/Scanner Assembly.
				5. Replace the DC Controller PCA.
		Engine Error. The formatter and engine		1. Power-cycle the printer by unplugging the printer
		are not communicating.		and plugging it back in. If this doesn’t clear the error:
				2. Reseat Formatter to DC Controller PCA.
				3. Replace the Formatter PCA
				4. Replace the DC Controller PCA.

Troubleshooting 7-11