Procedure to activate auto Tray switching in hp laserjet 4100

Check your feed rollers in tray 2. Sounds like they are worn and the paper cannot be pulled from tray 2 so it goes to tray 1

check configuration page for paper size in tray 2. It is taken from sensors on tray - make sure it is set correctly

Hi nicky_jj,

Kindly click on this link for the procedure on how you will clean and maintain your HP 4100.

Hope it helps.

Thank you for using FixYa.

HP LaserJet 4100 printer C8049A HP LaserJet 4100n network-ready printer C8050A HP LaserJet 4100tn network-ready additional tray printer C8051A HP LaserJet 4100dtn network-ready duplex printer C8052A
Which model do you have? There is an optional card to install before you can have it connected to an Ethernet network if you just have the 4100 model.

HP Laser Jet 4100 HP Not pulling paper from Tray 2
Action: The 4100 will look at tray 1 first then tray 2 If tray 1 is empty it will pull from tray 2 if the papersize matches the job otherwise back to tray 1 and ask for the paper. Your machine likely thinks the paper in tray 2 is not the size you want. For instance you have LETTER in tray2 But the machine thinks it is legal. The LJ 4100 detects the paper size in tray 2 automatically. If you print a configuration page: MENU them INFORMATION then ITEM then CONFIGURATION PAGE then SELECT. The page will print and show what size paper the machine thinks is in Tray 2 if it says LEGAL and you have LETTER you need to Check The Paper Backstop in TRAY 2. The back stop sets the length of the paper if it is not at Letter (8 1/2 x 11) the machine will not detect LETTER. Even if it just a little bit off or between positions.
If it is set at LETTER then you may have bad switches in the machine that are operated by the tray. Or the arms on the tray that operate the switches are not moving properly. You will find the arms on the rt, side of the tray and feel them change position when you move the backstop.

Hope this helps helps. Please keep us updated and remember to rate this answer. TF

Turn the printer off for a few minutes and then back on. If that does not fix the problem, try to have the print queue cleared and tray again. Most of the time it's a PDF file that causes this problem. If that does not fix it, it may need a new Jetdirect card.

most typical jams are caused by bad pickup roller or separation pad. When you pull out the paper tray, and look inside the printer above the tray area, there's a roller that is held on with a little clip in the center of the roller. Pinch that clip to take the roller out and clean with soap and water. do not use alcohol based cleaners, they dry the rubber up and shorten the life span drastically. The separation pad should be right at the front of the paper tray, clean that also. If your printer keeps jamming after that, you may have some more serious like a fuser going bad.

The 4100 will look at tray 1 first then tray 2 If tray 1 is empty it will pull from tray 2 if the papersize matches the job otherwise back to tray 1 and ask for the paper.
Your machine likely thinks the paper in tray 2 is not the size you want. For instance you have LETTER in tray2 But the machine thinks it is legal.
The LJ 4100 detects the paper size in tray 2 automatically. If you print a configuration page:
MENU them INFORMATION then ITEM then CONFIGURATION PAGE then SELECT.
The page will print and show what size paper the machine thinks is in Tray 2 if it says LEGAL and you have LETTER you need to Check The Paper Backstop in TRAY 2.
The back stop sets the length of the paper if it is not at Letter (8 1/2 x 11) the machine will not detect LETTER. Even if it just a little bit off or between positions.

If it is set at LETTER then you may have bad switches in the machine that are operated by the tray.
Or the arms on the tray that operate the switches are not moving properly.
You will find the arms on the rt, side of the tray and feel them change position when you move the backstop.
Hope this helps.

Hi,
you need an maintenance kit 4100

ACC C8057A Maintenance Kit, Fuser, 110V, LJ 4100 LJ 4100 Series ACC C8057-67901 Maintenance Kit, Fuser, 110V, LJ 4100 LJ 4100 Series ACC C8058A Maintenance Kit, Fuser, 220V, LJ 4100 LJ 4100 Series
Selected Item RG5-5069-000 See RG5-5069-090 Not Available 0
Alternate Item(s) RG5-5069-090 Fuser Film ***'y, 220V, LJ 4100 180.50 2 http://www2.printerworks.com/cgi-win/tpwall.exe/find?RG5-5069-000

HP LJ 4100 Fuserkit RG5-5069 HP

please tray to reset printer cold reset turn the printer off then press the go button then turn the printer on stay press go button when the message on control panel appear cold reset