Hp Officejet 6310 All-in-one paper jam

Here's a video that shows how to clear a jam on this printer.

I had this same printer “paper jam” / and sometime “cartridge jam” problem, I tried blowing the prinrter out with compressed air, cleaning rollers, everything; nothing helped. So another step I took was:

I saw there is a group of plastic parts directly under the cartridges. These parts looked REALLY gunked up with old ink. This turned out to be blocking the normal cycling of the cartridge cleaning mechanism which is under the cartridges. If I opened the print cartridge door, the cartridges would automatically move over to the right, but this covered up the area I needed to clean. To prevent this I held down the limit switch on the left hand corner of the printer base (its a black plastic piece about the size of a pencil erasure). That allowed the printer cartridges to cycle back through to the left-parked position. While they were on the left side of the cycle--exposing the right side "parked" area"--I pulled the power cord from behind the printer. This caused the cartridges to stay on the left side without me holding down the limit switch. This allowed me access to the right-side cartridge cleaning mechanism.

Count on needing about 2 dozen q-tips and some alcohol. Took me about 20 minutes and I couldn’t believe how much dried and almost dried ink was down on the parts. It turns out this was preventing the normal operation of the cleaning mechanism and the printer was reading this blockage as a paper jam (!?).

Anyway, once I cleaned all that **** out of there and powered it back up the cartridges no longer hesitated when they went to the right side and I could see the cleaning mechanism move back and front as it is supposed to. I hope this helps.

I was getting a paper jam error constantly with no paper jam. The solution I found was:
1 open lid to expose cartridge area
2 push power button to power off
3 allow printer to shut down- cartriges will park on the left side.
4 I had a gob of black ink residue under where the cartridges normally are. I gently cleaned this best I could with a screwdriver then several paper towells and iso alcohol. Under the cartrige area is a black plastic tray which can slide forward. I cleaned best I could under that as well.
5 close lid and power up and it now works perfectly!

I was told to clean all rubber rollers and it fixed my jam. Turn the printer around and take the back off & clean the rollers there also. You may also find the jammed paper/envelope there. Hope this helps.