Error code on hp 2420

hi i found the problem in hp laserjet 2420 printer error 41.2

Un expected paper too lengh, check papers are loading one by one or more then one at a time loading in side?..If multi papers are loading, replave separation padClean all paper path sensors..

52.00 error is not good.
If you tried powering off and on and that didn't work, a tech is going to have to look at it.
Problem could be the laser/scanner or the engine control board(ECU)

Does it give a 49.FF95? As their is no such error code "FF95" for a HP 2420. However I've seen 49. XXXX error codes before (XXXX meaning weird Alphanumeric Characters and numbers). This type of error code you can try a couple of Items:
1st - Perform a Cold Reset:
1. Turn the printer off.
2. Hold down the SELECT button, and then turn the printer on. Continue holding down
the SELECT button until all three printer control-panel lights flash once and then
remain on. This might take up to 10 seconds.
3. After the message SELECT LANGUAGE appears on the display, press the
UP ARROW button or the DOWN ARROW button until COLD RESET is highlighted.
4. Press the SELECT button. The printer performs a cold reset and then continues its
power-on sequence.
5. Check all I/O settings and reset any customer-set printer configuration values

If the machine still comes back to the Strange FF95 error I would start with the replacement of the formatter,
Part Number for the Formatter:
Network versions Q3955-60003
Non-network versions Q3953-60001

Hope this helps..

REPLACE FORMATTER.

This is a Fan issue you have 2 of them one on the front right side and one on the left. if you remove both covers see which one is not working
Now if their are both working then you will need to replace the ECU (Engine Control Unit).

I've attached a link that shows you how to remove the covers off the 2420 it's a pdf file .
And the Left side cover will need to be removed to access the other fan.

Hello,

If the printer is displaying 49.xx error message, followng the following document

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c00280149&jumpid=reg_R1002_USEN

Upgrading the firmware should resolve the issue.

Please let me know one you perform the above upgrade.

- Nikhil

This is a ram dimm error try changing dimm(s) to other slots(s) please ask for more info if required

A critical firmware error has occurred. Hp suggest reseating memory modules and upgrading the firmware, but i've found in the past if by turning it off and on a few times doesn't cure it the formatter board needs replacing (quite common on this model)

1) Your paper tray may be too full, makes it heavy to lift and not enough pressure for the pick up roller.
2) Pick up roller is slippery, wipe it clean with alcohol to make it abbrasive.