LaserJet 2600n: failure sensor output Possible in Laserjet 2600n after jam

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  In a noisy electrical environment the current drive for the signal is less inclined to pick up noise from a signal voltage level, as RF has pointed out the 4-20mA signal is useful for troubleshooting when a wire is disconnected - Mike

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• HP LaserJet 4250: Brick HP LaserJet 4250 after firmware update failed. Compact Flash card recovery options?

  While performing an update of firmware via FTP using cURL, the HP LaserJet 4250 I worked has frozen. I had no choice but to cycle the power and hope for the best, but unfortunately it was bricked. The screen no longer lights upward when turned on (although I can hear the internal working mechanisms which is a good sign).

  While doing some research, I read it is possible to buy a 32 MB CompactFlash card with preloaded firmware (http://bit.ly/1BTZGCh), put the jumper pin on the logic board to boot from it and then re-flashing the firmware on the card. Looks like a foolproof solution, but I would like to save my company some money if possible.

  I was wondering if it is possible to use a Type I, 128 MB Compact Flash card I have handy and load the firmware above myself using a USB Compact Flash card reader/writer. Judging by what I read on another post on the forum (http://bit.ly/1GR6nM7), it seems possible to use a Unix/Linux utility such as JJ to clone another job Compact Flash card with preloaded firmware. However, I don't have such a card to clone. What I have is another HP LaserJet 4250 in working condition.

  So that raises the question, is it possible to insert my own blank Compact Flash card in a HP LaserJet 4250 work and copy the firmware the logic board to the map image by using the printer control panel? I guess it would be the only way, if necessary, to get the firmware on the card.

  However, if she is not the only way, is there an easier way to get the firmware on the card? For example, can I just format the card in FAT32 and copy the file to the RFU firmware to it and start the printer from him? Or the use of HP does it's own file system that is not readable on a PC? Also, would it be possible to use dd and simply copy the RFU directly on the card device believed himself (no file system) and boot from that?

  Sorry for the barrage of questions. I tried to find the answers to all these myself, but HP doesn't seem to provide a lot of detailed documentation on works of the firmware via Compact Flash process. I'd be very happy if someone with experience could provide the answers well! Thank you.

  Looks like I'll be solving my own number here haha. So after bit peicing together information from different positions and some experiences, I managed to save my LaserJet bricks!

  To fix a HP LaserJet 4250 bricks, two things are necessary: an of Type I CompactFlash card and other HP LaserJet 4250 work. It's a common printer, chances are you'll find another around the office.

  Here are the steps to fix the printer:

  1. The card CompactFlash Slot 1 (bottom slot) on board the logical work printer. Instructions on how to do so are provided by HP here: http://bit.ly/1NNyIol
  2. (May be optional) Initialize (format) the CompactFlash card by following the instructions on page 327 of the repair of HP LaserJet 4250 (http://bit.ly/1D22T7R)

     (a) turn off the power to the printer.
     (b) turn on the power to the printer and then press and hold the MENU button when begins the memory count.
     (c) continue to hold the button down until all the lights on control panel three printer flashes once and then remain lit. It may take up to 10 seconds.
     (d) press the BACK ARROW button. The display should INITIALIZE the DISK.
     (e) press Select (mark). The printer initializes the hard drive and continues its power on sequence.

  3. Now that the CompactFlash card is formatted, it is time to copy the NAND of the printer to work on the CompactFlash card.

     (a) turn off the power to the printer.
     (b) turn on the power to the printer and then press and hold CANCEL when begins the memory count.

  
  (c) continue to hold the button down until all the lights on control panel three printer flashes once and then remain lit. It may take up to 10 seconds.
  (d) press the SELECT button (check mark).
  (e) press the MENU button.
  (f) use the arrow to scroll until you see COPY BOOTLOADER IN SLOT2.
  (g) press SELECT, and the cursor should get the word BOOTLOADER. Use the arrows to change this to NAND.
  (e) press SELECT, and the cursor should get the word SLOT2. Use the arrows to change this to SLOT1.
  (f) press SELECT. The copy process must begin, and the status will appear on the screen.
  (g) once the process is complete, turn the printer off and remove the CompactFlash card.
• Now that we have a working NAND on the CompactFlash card, it's time to restore to our printer masoned. Perform the following steps on the printer of bricks.

  (a) turn off the power to the printer.
  (b) Insert the CompactFlash card into Slot 1.
  (c) set the jumper on the System Board on the arrow to start from the CompactFlash card.
  (d) turn on the power to the printer and then press and hold CANCEL when begins the memory count.
  (e) continue now the button until all the lights on control panel three printer flashes once and then remain lit. It may take up to 10 seconds.
  (f) press SELECT (checkmark).
  (g) press the MENU button.
  (h) use the arrow to scroll until you see COPY BOOTLOADER IN SLOT2.
  (i) press SELECT, and the cursor should get the word BOOTLOADER. Use the arrows to change this to SLOT1.
  (j) press SELECT, and the cursor should get the word SLOT2. Use the arrows to change this to NAND.
  (k) press SELECT. The copy process must begin, and the status will appear on the screen.
  (l) once the process is complete, turn off the printer, remove the CompactFlash card and reposition the jumper to the default position.
  (m) turn on the power to the printer. That's all! Everything should work normally again. No brick no more!

UPDATE (07/04/15): IF YOU DO NOT HAVE ANOTHER HP LASERJET 4250

It turns out that you can just download the firmware on HP website and create an image of it bootable on a CompactFlash card. However, it is not as simple as just copying the firmware image. You should ignore the 633 first bytes of the file of the firmware (at least with the 08.260.1 version), then copy the rest on a CompactFlash card. You can accomplish this by running the following command on Mac OS X or Linux. Download and boot from a live CD of Linux like Ubuntu if necessary.

DD if = lj4240_4250_4350fw_08.260.1.rfu ibs = 1 skip = 633 of = / dev/disk2

Replace "lj4240_4250_4350fw_08.260.1.rfu" with the name of the appropriate firmware file and ' / dev/disk2 ' with the appropriate device if necessary.

If you prefer, a bootable copy of the revision of the 08.260.1 firmware can be downloaded here: http://bit.ly/1FeF3YP

As you can see in the image below, when opened with a hex editor, image downloaded from HP firmware starts with 1 b 25 31 2d bytes... However, the printer does not include the first part of the file when you start, because there are instructions of PJL and not binary. Bootable image begins at 631 byte (277 hex) highlighted. It may be possible that this address may change in future versions of firmware or for different printers, so here's how to know where to start the startup code. The first occurrence of 00 00 04 24 bytes, is where that starts. In ASCII, it looks to "... $". In this sequence, the 00 first is the beginning of the startup code. Here's another picture, of what should look like a bootable firmware image.

Non-bootable firmware image, downloaded directly from HP


Bootable firmware image, extracted of HP download



For fun, I unpacked it some of the files included in the firmware image, and it turns out that tracks on the printer to LynxOS. Who would have thought?

• HP Laserjet P3015: HP Laserjet P3015 - paper jams

  I just bought this printer in August 2015 and it keeps blocking every two pages. The most I managed to do print at the time was 15 pages when I used the Tray 1, but then he started jamming as well. The problem started 3 weeks ago. Finally, I disconnected and passed to another printer. Any help appreciated. I did the obvious things, such as disable, restart, tried on another computer, checked for jammed paper or small pieces. Nothing has worked. It is brand new.

  It is an error generated for the merger and the paper output area unit. I would contact the company you purchased the printer to go and let them know what going to, if you have not yet. It is possible, that you have a bad/old oven or a sensor damaged or blocked.  I'll try to help you solve the problem, but I also don't want to frustrate you. Fuser for this model is not something you can easily get out if you have not before and I'm sure that's not a replaceable element of customer.

  You can print with the back door of this open printer and the book will come out of the rear of the machine. Pull the rear door open a click (approx. 45 °) and try. If the paper is ok without interference, then the problem is probably with the exit sensor located adjacent to where the paper comes from the upper part of the machine. You will see a strip of thin black plastic in the Center and two large black tabs on each side of it. The should move freely without sticking.

  If the paper still crashes, then the problem is probably with the fuser unit. Whatever it is, the company that bought it from should be willing to help you if there is a defective part or bad connection somewhere.

  You can print on just 20 # bond 8.5x11 or something heavier like cardboard or labels?

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  Hey guys, thanks in advance for any assistance received.

  I have 6 sensors (RTD 3 and 3 Thermistors) connected to a NI 4351 and sensors gave the right outputs a few months ago, but now all the sensors give very low values. Any help will be greatly appreciated.

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• LaserJet M1522 \HP: I can print but not scan after 10 Windows installed with HP LaserJet M1522 after trying things on this

  I spent many hours on this forum today trying to solve my problem.

  Everything was fine until Windows 10 installed after I * thought * I hit cancel their incessant commercial.   Before the upgrade of the OS,

  1. I used a shortcut to C:\ProgramData\Microsoft\Windows\Start Menu\Programs\HP\HP LaserJet M1522\Scan which took "C:\Program Files (x 86) \Hp\Digital.

  2. a dialog box appears asking me to choose from a list of profiles of scanning that I did. Once what to choose, I have a second dialog box.

  3. I put the "paper Source" flat and the "Picture color" selected option button.

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  ______________________________________________________________________

  I have tried the following to solve this problem:

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  I'm afraid to do an uninstall of HP "stuff" because my computer is a HP and I don't want to aggravate my problems than they already are.

  I understand there is a windows application to use for scanning, but because it also controls the camera to the computer, I wanted to stick with the simple scan, which I used for many years now, coming to scan from my HP scanner/printer to my HP computer.

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  OK, got it to work!

  Desinstallion old prinerdriver as good as he got, withdrew the rest of this register and recycled the ' puter.

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• LaserJet 1300 paper jam

  LaserJet 3100 C3946A USBF021323 Mfg October 13, 1999

  Use of the history/primary

  A fed not location of several page for years. Only OK food for my purposes. Is not used for fax or printing from the computer. Use main scan and copy.

  Malfunction

  To replace the empty toner cartridge. First scan and copy effort leads to a paper jam in the copy with part of page rest phase in the feeder (don't remember if used not simple or multi bin for food). Page fired back with normal resistance (no tear or missing corners). First 1/3 of page was released folded in the second 1/3. Toner deposited as expected the first 1/3 and 1 inch in 1/3 second. Toner condition dry dust, unheated. Deposited toner clear and distinct than original scan. Next effort of scanning and copying. Sheet inserted in the tray sheet to the statement "Bin is empty please add paper." This resulted in "printer paper Jam check paper" Path message when paper is inserted. Can't see any piece of paper inside. Restart by pressing the "Stop/Clear".  Also turned off by unplugging the power cord for several minutes reconnect. 'Jam' same message when paper is inserted. Reinserted previous (almost empty) cartridge with results of same message "insert a paper and jam." Also tried the two reboot methods thanks to this previous cartridge.

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  Larry Strayhorn

  lstrayho@email. UNC.edu

  Thank you for your help.

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  Thanks for your help, but I gave up and bought a new HP LaserJet Pro 401dw and am just happy with it. Easy to use, faster, more intelligent 2-sided - what is not to like!

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