Solve problems checklist
Table 2-1 Basic problem solving
Problem Cause Solution
When the product is
connected to a correctly
grounded power source, the
LEDs on the control panel do
not illuminate and the main
motor does not rotate.
The product does not turn on.
No power to the product. 1. Verify that the power
switch is turned on.
2. Verify that the power
cable is correctly
plugged into the outlet
and the product.
3. Verify that the power
outlet has the correct
voltage.
The product has an internal
power failure
Check the fuses and internal
cable connections. Replace
any defective cables or open
fuses.
The formatter is defective. Replace the formatter. See
Formatter PCA on page 68.
The engine controller PCA is
defective.
Replace the engine controller
PCA. See
Engine controller
PCA on page 94.
When turned on, the LEDs on
the control panel light up, but
the main motor does not
rotate.
The product turns on, but the
motor does not rotate.
The print-cartridge door is
open.
Close the print-cartridge door.
A page is jammed in the paper
path.
Clear all paper from the paper
path, and make sure that all
sensors are working correctly.
The cable is not connected
correctly.
Reconnect the motor cable.
The motor is not mounted
correctly in the product
chassis.
Verify that the motor is
connected correctly and that it
rotates freely.
The engine controller PCA is
defective.
Replace the engine controller
PCA. See
Engine controller
PCA on page 94.
The main motor is defective. Replace the motor. See Main
motor on page 74.
The product turns on and the
motor rotates, but none of the
control-panel lights turn on.
For the HP LaserJet
Professional M1210 MFP
series, the control-panel
buttons are unresponsive.
The product is unresponsive.
The control panel is defective.
The formatter is defective.
For the HP LaserJet
Professional M1210 MFP
series, the fax PCA is
defective.
Replace the control panel.
See
Control-panel assembly
on page 62.
Replace the formatter. See
Formatter PCA on page 68 .
For the HP LaserJet
Professional M1210 MFP
series, replace the fax PCA.
See
Fax PCA on page 70.
102 Chapter 2 Solve problems ENWW
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