Posted by fmoo on May 15, 2009
My hinges also broke ink cartidge door stuck open. HP rep
online chat never was able to understand problem.
SOLUTION: open up printer using torx T10 bit. It is pretty tricky take off right side panel. Disconnect all cords, remove paper jam clean out panel in rear. Remove two silver colored screws behind this panel. Remove two black screws on rear of printer next to the hinges. This will allow the middle panel to swing down and be gently lifted back and away from the printer. You need to release the tab on the side panel underneath the open ink cartridge door. Use a putty knife or some other stiff thin metal object lift it gently and it will free the side panel. Disconnect the multi wire connector at rear of printer, then disconnect the three multconnector ribbons noting where they
connect. You will replace them in the opposite order. The entire scanner can now be removed (also a little tricky). With the ink cartidge door open (I assume you can't close it yet), push the outermst piece or end of the hinges uptowards the scanner deck (This is hard - the part is stiff) while this tab is pushed in slide the scanner up off of the hinge. TIP: Stand the whole printer on its left side (the printer is now perpindicular to your work area) this will take the weight off of the hinges.
Now with the jammed hinges uncovered, you will find a screw under the front side of the lid hinge. The hinge is slotted so you can reach through it with your Torx bit. Remove the hinge (it now just lifts out) Pull the hinge pin out and take out the black piece of plastic. Do this for both hinges. Just get rid of the worn out plastic piece (it hardly looks worn, and you might as well take the springs out too. Put the hinge together without the spring and the plastic part.
Now reassemble the whole thing. Your printer should work fine, but you will need to prop the thing open to change cartridges in the future.