Jammed paper in hp C4200 series

you can try these steps presented on the HP support page. Paper Jam Message Displays on the All in One. I hope this helps

I think C4200 is your printer series rather than model number. You can however download drivers for all the printers in this series (C4205, C4270, C4272, C4280) from here:

http://www8.hp.com/uk/en/support-drivers.html

Just search for C4200 and it will bring them all up.

you should contact any service centre.If you are not itself.
Treq Bin Mostaq
Bangladesh

Hi,

1. Click start --> Control panel --> Printer and faxes
2. Right click on printer 'C4200 series' and select 'Set as default printer'.
3. Right click again on the same printer icon and select 'Use printer Online'.
4. Try Printing.
5. You can delete the icon that says 'C4200 series(copy1)' if you are not using it.
   

Regards
Riztech

If you are not able to get the software drivers for the C4200 Series
then Click on the following Link
HP C4200 Series
Select your Product and then select the Software & Driver downloads option from the left

cheers
Tx

try turning off the printer for about 10 sec. to clear its memory and turn it back on.. then print again

There may be a small piece of either paper or dust on the sensor. Using a can of compressed air blow out the full paper path. If you still have an issue after that you may need some servicing.

Sounds like you need new rollers.
Here is a website that has instructions to replace the rollers.
This is for the 2300
http://www.laserpros.com/pdf/HP%202300%20Kit.pdf
this is for the 1320
http://www.laserpros.com/pdf/HP%201160-1320%20Kit.pdf

Click here to go to the HP Photosmart C4200 All-in-One series page .

then

Follow instructions here: HP Photosmart C4200 All-in-One Series - Obtaining and Installing ...

I'm afraid my solution was a very untechnical one - I tore off the damaged pieces of paper that I could reach, then spent a very long time gently pulling on individual pieces of paper, which were at first jammed solid, until at last one "gave", and I was able to withdraw the other pieces.
I'm sure there must be an easier way by dismantling something, but I didn't want to do that without advice.