CURE: Perform the User and Service Test prints to eliminate a
failed I/O PCB as described in steps 1 and 2 of the LaserWriter
Functional Check in the LaserWriter Technical Procedures.
If the problem is with the I/O PCB, follow the procedure located
in the LaserWriter Technical Procedures to perform the repair.
If the problem is with the print engine replace the toner cartridge
first and recheck for the problem. If the problem still remains,
replace the DC controller PCB.
If this cure does not resolve the problem, go to the LaserWriter
Technical Procedures to obtain the general troubleshooting procedure
for this product.