HP LaserJet 700 M712- "Close Left Door" Message

[SD-86]

One way to resolve a "Close Left Door" message on the M712 product is described below:

1. Remove the duplexer (if one is installed) and left door
2. Remove the fuser- unlock by rotating the blue locks to the horizontal position.  Pull the fuser out using 2-hands placed on the lower guide with blue labels on it
3. Re-install the fuser using 2-hands one on each of the blue labeled area, slowly insert and firmly seat the fuser (do not slam it in)
4. Rotate the left and right side blue locks so they are in the vertical position.
5. Install and close the left door
6. Install the duplexer
7. If the message still occurs after this operation, then contact HP support for further service options.  (Or, reply to this post and I may be able to help you with further troubleshooting).

I hope this helps,

DaveK.

Although I am an HP employee, the information conveyed in this post are my own and do not represent Hewlett Packard's position in any way. 

[gfxraymond]

I tried all the option as you suggestd but still same problem ... So now planing to contact HP Service Engineer .. 

[thePaul]

Hello ,  you need a philips screw driver fo you to fix this problem ,

the switch of the left door is not activated by the little plastic tab on the left door

-check for broken tab

-you need to remove back cover and low voltage power supply

-check the left door lever behind low voltage power supply

check for correct motion of the lever.

there's a plastic cover over le door switch, you need to have the door open to remove.

I know it a technician job..

goog luck.

[RebeccaZ]

We removed the back cover and the voltage supply like the post above said. We checked the lever motion and found it sat a little low. The spring worked and everything looked to be intact, but it still wasn't engaging the sensor. We saw a hole that was barely visible on the other side of the lever (picture below of hole after lever removed ) and thought maybe there was a peg or something that was supposed to be there to ensure the lever sat up enough to engage the sensor. So we "MacGyvered" the printer, by cutting sticky computer feet tabs and placing one in the hole and then on both sides right below to hold it in place (picture below after lever was put back on with tabs). We re-inserted the left door and ensured the sensor was engaged.  Put everything back together and the "close left door" error did not appear.

Obviously, this isn't the most technical solution; however, when a printer is out of warranty and people need to print, this was our best solution and it worked. Our next option was to just remove the sensor, but we weren't exactly sure if the printer would initialize.