Table 19. Troubleshooting copy processor board LEDs

LED pattern

Control panel displayMFP functionalityAction
(LJ4100mfp and

 

 

 

 

LJ4101mfp only)

 

 

 

 

 

 

 

 

 

OFF OFF OFF OFF

None (no power)

● Print (a configuration page)-no

1.

Verify the MFP power is turned on

 

 

● Copy (from the ADF or glass)-no

(see “Basic troubleshooting” on

 

 

● Send (digital sending)-no

page 114 and “Power-on defects” on

 

 

page 116).

 

 

 

 

 

 

2. Verify that the MFP is plugged into

 

 

 

a working power source.

 

 

 

 

 

OFF OFF OFF OFF

Alternates between Power

Select OK, then attempt to

1.

Reseat the CPB.

 

and Check Cables And Cycle

● Print (a configuration page)-no

2. Turn the MFP power off, then back

 

Power

● Copy (from the ADF or glass)-no

on again.

 

 

● Send (digital sending)-no

3.

Verify that the scan unit power

 

 

supply is functional (see “Power

 

 

 

 

 

 

supply” on page 63 and “Power-on

 

 

 

defects” on page 116).

 

 

 

 

ON* OFF ON ON

READY, POWERSAVE ON,

● Print (a configuration page)-yes

Normal ready state. No action

*Flashing

or PAUSED

● Copy (from the ADF or glass)-yes

required. For information about the

 

 

● Send (digital sending)-yes

PAUSED or POWERSAVE ON

 

 

modes, see the hint in “Using the

 

 

 

 

 

 

control panel” on page 30.

 

 

 

 

 

ON* OFF ON OFF

Alternates between Power

Select OK, then attempt to

1.

Verify that the high-speed copy

*Flashing

and Check Cables And Cycle

● Print (a configuration page)-yes

connect cable is fully seated at both

OR

Power

● Copy (from the ADF or glass)-no

ends (see “Copy processor board” on

 

● Send (digital sending)-no

page 83 and “Formatter cage” on

 

 

page 87).

 

 

 

OFF OFF ON OFF

 

 

2. Turn the MFP power off, then back

 

 

 

on again.

 

 

 

3.

Replace the high-speed copy

 

 

 

connect cable.

 

 

 

 

 

ON* ON ON ON

Alternates between Power

Select OK, then attempt to

1.

Reseat the firmware DIMM (see

*Flashing

and Check Cables And Cycle

● Print (a configuration page)-yes

“Copy processor board” on page 57).

 

Power

● Copy (from the ADF or glass)-no

2. Turn the MFP power off, then back

 

 

● Send (digital sending)-no

on again.

 

 

 

 

 

 

 

 

 

ON** ON ON ON

Alternates between Power

Select OK, then attempt to

1.

Reload the MFP firmware (see

**Dimly lit LED

and Check Cables And Cycle

● Print (a configuration page)-yes

“Downloading a remote firmware

 

Power

● Copy (from the ADF or glass)-no

update” on page 41).

 

 

● Send (digital sending)-no

2.

Replace the firmware DIMM (see

 

 

see “Copy processor board” on

 

 

 

 

 

 

page 57).

 

 

 

 

 

ON ON ON ON

Alternates between Power

Select OK, then attempt to

1.

Reseat the memory DIMM (see

 

and Check Cables And Cycle

● Print (a configuration page)-yes

“Copy processor board” on page 57).

 

Power

● Copy (from the ADF or glass)-no

2.

Verify that the memory DIMM is a

 

 

● Send (digital sending)-no

16MB DIMM.

 

 

3.

Replace the memory DIMM.

 

 

 

 

 

 

4.

Reseat the firmware code DIMM.

 

 

 

 

 

Note

Hint

If the CPB failure persists after all attempts to troubleshoot the problem, replace the CPB.

The LED patterns an HP LaserJet 4100/4101mfp displays are the opposite of those on the HP LaserJet 9000mfp because of how the CPBs are mounted. The CPB is mounted upside down in the HP LaserJet 9000mfp.

C9148-90909

7 Troubleshooting 125