Hp Laserjet 4250: upgraded firmware printer says Firmware corrupt in external attachment resend upgrade. Resending doesn't help. The attachment is a Q2443B stapler/stacker. I removed the stacker and successfully upgraded the printer firmware but now the firmware in the Q2443B stapler/stacker unit is corrupt. How do I install the firmware on the Q2443B stapler/stacker?
SOURCE: HP LASERJET 4250 DUPLEX ISSUE
only problem ive had with the earlier model not doing duplex was a sheet of paper in the duplexer bin . This is hard to find but if you pull out the paper tray and look in the space where the tray goes up above theres a lever which you can push and it releases the hidden duplex bin which stores the paper at half way through the double pass and if there is any paper in there then the printer will not duplex.
SOURCE: Firmware upgrade LJ 3055
I foud the solution read carrefuly and he will works !!!
Turn off the printer .
Open the side cover where place the formatter on the right face
Here you will se a jumper
On your computer delete all hp software
Install HP 3055 pcl 6 drivers and select manualy your usb port where is connect the printer ( the printer is always off)
Download this :
ftp://ftp.hp.com/pub/softlib/software8/COL13630/ma-38209-5/3052-55_FW_Update-20070331.exe
Open the program select your printer and send the firmware (the printer is always off)
When the firmware is upload completly and you see the smileys on the sofrware update.
Closed the jumper P19L on the formatter and turn on the printer.
You will see message on the printer Downloading.
Open immediatly the jumper connection
Wait and you will see a message like Update successfully :)
turn off the printer
wait 5 seconds
Turn on the printer
It s ok
Marc
SOURCE: My hp laserjet M1522nf is
You need to connect the unit via USB and then run the HP firmware update utility so that the current firmware can be installed. This error is usually caused when a firmware update is interrupted. Current firmware for this unit is 20100902.
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