Error 30 or 50

tray this Tweaks,
Rest by:-
1- disconnect from Power first unplug it from the power source, then unplug it from printer make sure its unplugged0 for at least 30 seconds.
test it by adding 10 sheets for good rollers grip

2- if not work: _clean all rollers by dipping ear cleaner in water then one touch to dry cloth to remove water surge make sure to clean front and back rollers.
hope it will work :)

IF THIS PROBLEM IS PERSISTING THEN YOU WILL HAVE TO OPEN THE PRINTER AND LOOK FOR ANY KIND OF PAPER BITS STUCK TO THE CORNERS OF THE PRINTER FROM INSIDE

For Paper Output Tray error

Paper may be jammed. Remove the jammed paper, reload paper properly in the printer, then press the Black or Color button.

or

look for buttons or such things on the part that has blue rectangle below.. check inside if theres piece of paper or any object.

Jessica:

This could be one of a few things... First, Windows 8 is a completely different animal from Windows XP! Try reloading your printer driver in Windows 8. If this doesn\'t work, you need to clean the paper pickup rollers at the front of the printer (where the paper first feeds into the machine. I use a Q-tip moistened (not sopping wet) with rubbing alcohol... gently scrub the whole pickup roller and then the feed roller next to it. Check carefully (with a flashlight) for any shards of paper that might be blocking the paper path. There is also a sensor flag (small finger of plastic) sticking up that the paper must hit to let the printer know that the paper is feeding through. If you do not see the sensor flag, it is either jammed or has been broken off when a piece of paper was pulled backward out of the paper feed area. First reload the printer driver, and try to print. If it doesn\'t print, check and clean the rollers and look for the sensor flag.

no its sensor problem

try vacuum cleaning ink cartirge mechanical area maybe some dust or paper there. or change ink cartridge.

If you are getting a 'carriage jam' error as soon as you turn on your printer with no tasks in progress, then check for any piece of paper stuck in the carriage. Remove the paper carefully. If the paper tears, part of it might remain inside the paper path and damage the product.

Follow the steps for fix HP Printer Carriage Jam

• Turn off the printer and open it to see where the paper is stuck.
• Manually move the carriage toward the opposite side.
• Check the paper path and remove any piece of paper or any other object that is stuck in the path.
• Reconnect the power cord and turn on the printer.

Hello, you´re found problem in the fusion unit. Clean the thermistor, and try again. Before try it, most reset the Sc code with service code....Good Luck!

My 2400W was standing a long time without being used, and when I wanted to use it, it made a very faint image and showed "paper jam at transfer roller". Also, the image stayed on the transfer belt, but never got transferred to the paper. I tried a lot of things, nothing worked, but the message from weirdal1968 above pointed me in the right direction.

I eventually scratched / scrubbed / cleaned the copper pad on the left side of the optical imaging drum - this copper pad probably receives the bias voltage for the imaging drum from a springy stainless steel wire. There was some visible darkening of the copper pad where the stainless steel wire touched, this is what I cleaned. And then, presto, problem solved - the image came out great, and no more "paper jam at transfer roller" error message.

ellow bkadam,
there something little piece of paper stuck at you fuser there.that why appear paper jammed...try to open u fuser cover...maybe it can help