Skip to main content

Display panel problems on HP Officejet 8600 printers

The LCD touchscreen display is very light, blank, unreadable or broken...

Solution 1:
  • Unplug the power cable from the printer and the wall.
  • Wait 10 minutes.
  • Plug the printer back in directly to a wall outlet.

Solution 2: (for a blank screen)

Solution 3:

Solution 4: you have to replace the Display Control Panel.

  • For HP Officejet 8600 series, the part number of the Display Control Panel is  CM749-60021:

  • For HP Officejet 8500, 8500a series, the part number of the Display Control Panel is  CM758-60006:


Anonymous said…
I also had the problem with a blank, bright display.
Actually I fixed it by changing a SMD-condenser on the display backplane.
Unfortunately i can't post a photo.
herby said…
I have same problems with a HP Photosmart 309 a All in one printer

Please post or send me yours solution.
I will check if I can do same on my printer.
Anonymous said…
I am experiencing this issue; solutions 1-3 were not successful so have ordered and received replacement part. No replacement/installation instructions were included. Any guidance from other users appreciated.
Anonymous said…
Please, where did you buy the replacement part? Thk you
Anonymous said…
My Officejet Pro 8600 control panel is wider than the picture shown above-HP lists the P/N as CM749-60085
Karel said…
I had the same problem with LCD as wrote Anonymous user (March 9, 2015). After resoldering the smd capacitors on the control board near the connector into LCD the display is OK. Maybe there was only a "cold connection".
Konrad Smit said…
I currently have the problem as listed in solution 1 were the screen shows up lightly but still works fine.

It also has some lines running over the panel of the display.I have followed the instructions as listed in solution 1 were i unplugged the printer from the power supply, waited for 10 min and powered up the unit again. Basically giving the unit a hard reset.

The printer i have is the HP Officejet Pro 8600 (FPU No:CM749-64001).

After re-applying the power to the printer again, the display started up with the HP logo and looked pretty good again as it should, but after a couple of seconds it started fading away again and ended up back to were it was before the power down session.

From this i am assuming that the display has incurred some damage internally and i would probably have to replace it at some point.

Just to save on the money side i think i will run it as it is at the moment and just wait until it completely bombs out.

Popular posts from this blog

Service tool V3400 for resetting Canon printers counter

The Service Tool V3400, and service tool V3600, allow you to reset the waste ink pad counter on some Canon printers: 

You can solve the messages errors "Waste Ink Tank Full" or "Waste Ink Pad Full", "error 5B00" or "Error P07" on these printers:
Canon Pixma iP2700, iP4800, iP4810, iP4840, iP4850, iP4900, iP4910, iP4940, iP4970, iP4980, iP4990, iP5810, iP5880 Canon Pixma MP230, MP240; MP250; MP260; MP270; MP280; MP480; MP490; MP540; MP550; MP560; MP620; MP630; MP640; MP980; MP990; Canon Pixma IX6500, IX6510, IX7000 Canon Pixma IP3600, IP4940 Canon Pixma PRO9000, PRO9500 Canon Pixma MG2120. MG2140, MG2240, MG2250, MG2440, MG3240, MG3140, MG4100, MG4140, MG5140, MG5150, MG5240, MG5340, MG6140, MG6240, MG8140, MG8240 Canon MX397, MX320, MX330, MX370, MX860 etc
Where can you download the Service Tool V3400 ?

It is free here:
There is too a paid version here:
V3400 Canon Service Tool for all iPxxxx series, i…

How to fix error B200 on canon Printers

Error B200 means the printhead voltage or temperature is not normal. The Printhead could be defective.... but first, try these solutions below:

Solution 1:
Disconnect the power cable from the printer.Wait 1 hour.Connect the power cable
Solution 2:
Check and Clean Head contact pin condition of the carriage unitCheck Cable connection especially the carriage FFC
Solution 3:
Turn off the power Open the panel Turn on the power Wait for print carriage to start moving to the left.Let it go past half way Before print carriage reaches left hand side shut the cover. Leave the Printer turned on
Solution 4:
Unplug the power cable.Open the printerPush the whole print head mechanic to the centerWhile the printer still open, plug the power and turn it ON. When the printhead still moving and is going to the very LEFT, close the cover. Wait until its boot up. 
Solution 4a:
Take out all of the ink cartridgesLift up the grey bar by where the ink goesLeft the print head in the middle of the pr…

Error 5100 on Canon printers

 MAJ 17/09/14

Error 5100 appears on these Canon printers: MP140, MP150, MP160, MP190, MP210, MP220,  MP800, MP810, MP170, MP180, MP450, MP460, MP830, MP970, MP980, MP240, MP250, MP260, MP270, MP480, MP500, MP510, MP520, MP530, MP540, MP620, MP550, MP560, MP610, MP630, MP800, MP810, MP830, MP970, MP980, MG2100, MG3100, MG4100, MG5100, MP640, MP990, MG5200, MG5300, MG6100, MG6200, MG8100, MG8200

It's a Carriage error.

Solution 1:
Look inside for a tiny object like a piece of paper, a staple...
Solution 2:
The purge cap (the white sliding mechanism that the print head parks to when it's not in use) may be not lubricated well enough . Lubricate the sliders with some white grease (don't get it on the small wipers or the black caps); this repair probably require to remove the right panel off of the printer to gain access to the purge mechanism.
Solution 3: Clean the timing strip: there is a thin plastic strip running across the width in front of and below the drive belt: there are f…