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Installing a Flash DIMM in the Hewlett Packard Laserjet 4000 Series

Note: The Laserjet 4250  and later printers no longer support eForms DIMMs. Instead, please consider our NetBOX device, which will provide complete support for this, and other, late model HP printers.

If you are replacing an eForms chip, be sure to remove the correct chip! These printers support a lot of upgrade options so there probably will be several other types of chips in the printer.

Start by printing a configuration page:

  1. Press [Menu] until INFORMATION MENU appears.
  2. Press [Item] until PRINTER CONFIGURATION appears.
  3. Press [Select] to print the configuration page.

The eForms chip will show on the configuration page under the section "Installed Personalities and Options" as either 2MB ROM or 2MB FLASH. Notice the DIMM Slot that the chip is installed in.

In the 4000, 4050 and 4100 the slot numbers are from the bottom up, so if the flash chip is in slot 3, that is the third slot from the bottom. In the 4200, they have apparently changed the order to top down... now slot three is the second from the bottom or 3rd from the top.

This series of printer has three (or four) dual in-line memory module (DIMM) slots for upgrading with many different options:

  • More printer memory (SRAM).
  • FLASH memory DlMMs, available in 2 and 4 MB. Unlike standard printer memory, flash DlMMs can be used to permanently store downloaded items in the printer, even when the printer is off. If the FLASH memory is formatted in LJ 4000 exclusive mode, it can be updated with an E-Forms .ALL file. Most Flash DIMMs will be formatted in ROM format and can be updated by replacing the chip.
  • DlMM-based accessory fonts, macros, and patterns.
  • Other DlMM-based printer languages and printer options.

Single in-line memory modules (SlMMs) used on previous HP LaserJet printers are not compatible with these printers.

Chip Installation / Replacement / Removal

Static electricity can damage dual in-line memory modules (DlMMs). When handling DlMMs, either wear an anti-static wrist strap or frequently touch the surface of the DlMM's anti-static package, then touch bare metal on the printer.

Turn the printer off. Rotate the printer for access to its right side. Unplug the power cord and disconnect any cables.

Grasp the cover (as illustrated) and pull it firmly toward the rear of the printer until it stops. On some printer models, there is a screw at the top rear of this panel that must be loosed to allow the panel to be pulled back.

Remove the cover from the printer.

Loosen the captive screw holding the DIMM access door with a Phillips #2 screwdriver if necessary (some 4100 printers may not have a screw). Open the door.

If you are replacing or removing a DIMM, find the correct dimm by referring to the Configuration Page (see above) or by an identifying label. Please take care NOT to remove firmware or RAM chips as this may cause the printer to stop operating. When you have identified the correct chip, pop it out by pushing back the locks on the left and right edge of the chip. Place the chip in an anti-static bag.

Remove the DIMM from the anti-static package. Hold the DIMM with fingers against the side edges and thumbs against the back edge. Align the notches on the DIMM with the DIMM slot. (Check that the locks on each side of the DIMM slot are open, or outward.)

Press the DIMM straight into the slot (press firmly). Do not use the locks to insert the DIMM. Just press harder until the locks come all the way up on their own. Make sure the locks on each side of the DIMM snap inward along side the edges of the DIMM without being pushed. Do not use the locks to insert the DIMM. (The locks are used to remove a DIMM)

Close the DIMM access door and tighten the screw.

Set the bottom of the cover onto the printer. Make sure the bottom tabs on the cover fit into the corresponding slots in the printer. Rotate the cover up towards the printer.

Slide the cover toward the front of the printer until it clicks into place. Reattach any interface cables and the power cord, then turn the printer on and test the DIMM.

Checking Memory Installation

Follow this procedure to verify that DlMMs are installed correctly:

  1. Check that the printer's control panel displays READY when the printer is turned on. If an error message appears, a DIMM might have been incorrectly installed. Check the printer messages section of the printers users manual (page 72).
  2. Print a new configuration page.
  3. Check the memory section on the configuration page. and compare it to the configuration page. printed before the DIMM installation. If the amount of memory has not increased, the DIMM might not be installed correctly (repeat the installation procedure) or the DIMM might be defective (try a new DIMM). Notice that the slots are numbered from the bottom up.

Configuration Page

Use the configuration page to view current printer settings, to help troubleshoot printer problems, or to verify installation of optional accessories, such as memory (DlMMs), paper trays, and printer languages. If an HP JetDirect print server card is installed (HP LaserJet 4000 N/4000 TN printers), a JetDirect configuration page will print out as well.

To print a configuration page:

  1. Press [Menu] until INFORMATION MENU appears.
  2. Press [Item] until PRINTER CONFIGURATION appears.
  3. Press [Select] to print the configuration page.

File Directory

Use the file directory page to view current contents of the Flash DIMM (not applicable to ROM DIMMs)

To print a configuration page:

  1. Press [Menu] until INFORMATION MENU appears.
  2. Press [Item] until PRINT FILE DIRECTORY appears.
  3. Press [Select] to print the configuration page.

Note which FSA device number the DIMM is listed under. If the DIMM is the only FSA device installed in the printer (no hard drive or second Flash DIMM), it should be device 0.

Test the printer and verify that it works correctly before continuing on to the next printer

If you are replaceing chips, return the old chips to avoid being invoiced for their value!

Other / General Information

Notes: Tray select commands. <esc> & l # H where # is one of:

  • 0 = prints or ejects current page
  • 1 = Tray 2
  • 2 = manual feed, paper
  • 3 = manual feed, envelope
  • 4 = Tray 1
  • 5 = Tray 3
  • 6 = Envelope Feeder
  • 7 = auto select
  • 8 = Tray 4
  • 20-69 = external trays.

On printer power up, if the display shows: 53.xy.zz PRINTER ERROR then a problem with the product’s memory has occurred. The DIMM that caused the error will not be used. Values of x, y, and z are as follows:

X - Device type:
  • 0 = ROM
  • 1 = RAM

Y - Device location

  • 0 = Internal memory (ROM or RAM)
  • 1 to 3 = DIMM slots 1, 2, or 3

ZZ - Error number

You might need to replace the specified DIMM. Turn the product off, and then replace the DIMM that caused the error.