Control panel message Description Recommended action
512-Chassis, Rear Chassis, or Front Chassis Fan
not Detected
Fan is not connected or may have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
514-CPU or Chassis Fan not Detected Fan is not connected or may have
malfunctioned.
1. Reseat fan.
2. Reseat fan cable.
3. Replace fan.
660-Display cache is detected unreliable Integrated graphics controller display cache is
not working properly and will be disabled.
Replace system board if minimal graphics
degrading is an issue.
1720-SMART Hard Drive Detects Imminent
Failure
Hard drive is about to fail. (Some hard drives
have a hard drive firmware patch that will fix an
erroneous error message.)
1. Determine if hard drive is giving correct
error message. Enter Computer Setup and
run the Drive Protection System test
under Storage > DPS Self-test.
2. Apply hard drive firmware patch
if applicable. (Available at
http://www.hp.com/support.)
3. Back up contents and replace hard drive.
1801-Microcode Patch Error Processor is not supported by ROM BIOS. 1. Upgrade BIOS to proper version.
2. Change the processor.
2200-PMM Allocation Error during MEBx
Download
Memory error during POST execution of the
Management Engine (ME) BIOS Extensions
option ROM.
1. Reboot the computer.
2. Unplug the power cord, reseat the
memory modules, and reboot the
computer.
3. If the memory configuration was recently
changed, unplug the computer, restore
the original memory configuration, and
reboot the computer.
4. If the error persists, replace the system
board.
2201-MEBx Module did not checksum correctly Memory error during POST execution of the
Management Engine (ME) BIOS Extensions
option ROM.
1. Reboot the computer.
2. Unplug the power cord, re-seat the
memory modules, and reboot the
computer.
3. If the memory configuration was recently
changed, unplug the power cord, restore
the original memory configuration, and
reboot the computer.
4. If the error persists, replace the system
board.
136 Chapter 10 POST error messages ENWW