unknown

asked Dec 26, 2003 at 9:39am
Hp HP DeskJet 720

HP printer cartridge carriage does not move

Our HP 720 C printer's cartridge carriage will not move to center when lid is lifted. What is wrong ?
I keep getting a message "press enter to align cartridges" and there is nothing wrong with the alignment. Previously when this happened someone told me what to do to rid this problem and it worked but now I can't remember what I did. It was just a matter of pressing and holding something? Anyone know of this solution?
Thanks-
by Anonymous on Dec 26, 2003 at 11:03am Add comment
Ellen
I assume that the green power light is on. Does the printer make any sound at all when you open the cover? Are there any blinking lights? If so, which ones?
by Bert on Dec 27, 2003 at 5:01pm Add comment
Bert,
Power light is on.
No sound ,no blinking lights.
I assume that perhaps a sensor broke over moving ,to a different house, which I did twice with this printer.

It poses a problem when wanting to change ink cartridges. This last time we took the cover off with directions from Tracy's post. That worked!
by unknown on Dec 29, 2003 at 5:02pm Add comment
I have the same problem with my Deskjet 1120C. It seems to print fine but when I need to change the cartridge it will not move to the center. Any suggestions?
by Sue on Dec 29, 2003 at 5:46pm Add comment
Ellen,

I think you're right on target with the sensor idea. The good news is that, if you're lucky, you won't have to take the housing off.

Look at the underside of the cover, along the edge where the hinges are. You should see a couple blade-like projections, that disappear into slots in the housing when you close the cover. One of those slots (probably the left one) appears to have no use on this printer; it will be nothing but a clear hole. If you look into the other slot you will see a square block on each side of it (this is below the surface of the housing).

Those blocks are an electronic eye that senses the presence/absence of the blade on the cover. When the cover closes, the blade interrupts the line of sight between the two blocks, and the printer assumes the cover is closed. The same thing will happen if there is dust or an obstruction between the blocks. If you see something like that, try to remove it.

If there is no obstruction on or between the blocks, the problem is probably an electrical failure that won't be worth fixing unless you happen to have another 720 to salvage from [the sensor blocks are built into a circuit board on the back of the unit]. If it comes down to that, let me know, as I may be able to get one from an HP 722.
by unknown on Dec 29, 2003 at 6:05pm Add comment
Ellen,

Make sure the lid sensor isn't damaged or dirty. If the printer doesn't think the lid has been lifted it won't bring the carriage into the middle.

Al
by unknown on Dec 30, 2003 at 4:22am Add comment
If that doesn't work, print a blank page and when the cartridges are in the middle pull the power lead out of the back. It'll save you taking off the covers.

Al
by unknown on Dec 30, 2003 at 4:25am Add comment
I have a Hp 3820 . The paper feeds though but the cartridges not not move or it moves to the left and just sets there while the paper just runs though. HELP HELP
by unknown on Aug 27, 2004 at 3:49pm Add comment
A typical unrepairable failure on the 3820 because there are no parts available. Don't waste your time fretting over it-you probably got your moneys worth. Join the legions of others who have discovered that cheap printers don't last. Spend over a $100 for a new printer.
by Bert on Aug 27, 2004 at 4:33pm Add comment
I was just reading today that HP is coming out with a whole new series of 12 deskjets. They use a super-duper new ink. You can put a drop of black into a pool of yellow ink and it won't mix with it. Also fades less than Kodak prints. They start at $99.99. I'd avoid the lowest cost model.
by moe on Aug 27, 2004 at 4:41pm Add comment
TRIED TO REPLACE THE DRIVE BELT HAVE IT BACK TOGETHER AND THE SPITOON WON'T RESET ITSELF JUST MAKES GRINDIND NOISE...I HAVE TAKEN IT OUT AND CLEAN ALL THE INK OUT OF IT THE SPONGE WAS FALLING APART AND IS NOT THERE ANY HELP OUT THERE
by pac722 on Jan 25, 2006 at 6:31pm Add comment