HP Laserjet Pro MFP M127fn Led Panel No Display

Today one of the printer repair case, customer send to shop and complain the printer can’t photostat.

Once i power on the printer, i notice the led panel on the printer is not display, blank screen only and alarm Led & Ready Led light on.

Blank Screen

Normally case like this is the cable problem. Open the left case of the printer, you will see the ribbon cable, see the image below.

this ribbon cable is connect lcd panel to mainboard

Take out the ribbon cable check it is damage, if not then use alcohol clean the connector then plug it back. Luckily this printer cable isn’t damage, after cleaning then plug it back to main board.

Power on the printer and test, the display is back. 

Display is Back

How to Disassemble HP MFP M127FN? Check the video below.