Fix inner paper jam hp cm1312

Browse the link for installation procedure & hardware setup..etc,,
http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c01424292/c01424292.pdf

Turn power off. Unplug printer. open and close firmly every door, hatch, panel, and drawer. Verify all toner cartridges are full. Verify that no paper is jammed in the mechanism. Power printer back on.

If your printer has a paper tray, do not fill the tray. Overfilling the paper tray is frequently causes paper jams. Many printers have sliding mechanisms that allow different types and sizes of paper to be fed into the printer. If the slider is not correctly positioned, it can cause a paper jam.

Follow these steps :
1.1
Take out any paper that is not jammed. Remove the loose paper from the in and out paper trays to prevent any more paper from being pulled into the jam.
2.2
Open the cover of your HP laser printer. This will give you access to the inner machinery of the printer and should unveil the jammed paper. If you do not see jammed paper, you may have another type of malfunction.
3.3
Gently pull on the jammed paper. In many cases, it will come out easily.
4.4
Move the rotors on the inside of the printer by pressing the flashing button on the housing of the printer. This may help to loosen any jammed paper.
5.5
If the jam persists, unplug your HP printer. You'll be able to pull more firmly on the paper with the power turned off. Be careful not to rip the paper.
6.6
Attempt printing again. Refill the trays with paper and plug your printer back in to test its functionality.

Go to HP Support at -> HP Support & Drivers 1

paper jam inside HP Color Laserjet CM1312 MFP, not related to paper tray and is deep inside where it cannot be pulled out

Lift the scanner lid, then lift the black part of the fax - pull up hard for it to lift. Unjam the paper either still on top or gently lift the inner section and retrieve your jammed paper. Then put everything back together and you're right to go again.

plz clean your printer

After a frustrating support call from HP where they wanted me to send the printer into a service centre for a ridiculous cost, I tried troubleshooting myself and seemed to fix this error 51.23.

The solution was to put the printer in cleaning mode:

Setup - Service - Cleaning mode

Hope this helps other people....