Message on monitor tells me scanner not found. could not be initialized.

Background of issue- When 4345/M4345 boots up, amber light comes on under start button and the message "Initializing Scanner" is displayed. The unit will print but will not preform any scan functions.

Steps taken to try to resolve issue:
1. Updated firmware
2. Restored factory defaults
3. Took off cover in back of printer covering scanner controller board and reseated all cables
4. Took apart scan unit and cleaned (2)mirrors in scan head
5. Took off back cover of unit, reseated cables coming from scanner controller board
6. Ran Scanner Test, in menu (which everything functions properly)

Usually I would say scanner or controller board has failed but I had 3 M4345 come down with this issue in one week. The only resolve i've found for this issue is repetitively turning on and off the unit until it comes up without "scanner initializing" message. Once it comes up it functions 100% until the unit is turned off and issue will come back.

I'm at a loss here with so many units having same issue, open to any advice. I once took the formatter out of bad unit and put it in good one and it caused the issue in the good one but i'm double verifying this tonight. Thanks for any help.

check is your scanner already active, if it's active try to uninstall the driver first then restart the pc, than install the driver again

If your scanner has a twain driver, you could install drivers on the device and use Elusiva Remote Scanner from www.Elusiva.com/products/RemoteScanner

go to device manager look for imaging device (scanner) right click and uninstall. / click scan for hardware changes tab, found new hardware must be appeared and click next / select don't search, i will choose the driver to install / click show compatible hardware and choose scanner driver found and click next. and finish.

insert installation cd adn perform add a device. or if your pritner is connected to bluetooth it will not scan. as blue tooth signal is not strong enough to scan from pritner to computer. it works on some but don't work on all blue tooth

Try shut down pc,then unplug the scannner usb.
Restart the pc and plug the scaner in and see if it finds it then.

If you're using Vista, this happens all too regularly with HP printers. I've had a few where I have to uninstall everything then re-install to make things work.
Two weeks later the same thing, same process.
Try downloading latest drivers from HP and see if that helps. HP don't admit there's a problem.
Don't seem to have this problem with Epson printers tho.

Restart computer and scanner, try scanning from computer.

try using a lower resolution for your scan... also this is a known problem for windows vista what o.s. are you using?

Select from the list below

Windows
» HP Scanjet Scanners Supported and not Supported in Microsoft(R) Windows XP » Resolving 'Missing MSIEXEC.EXE File is Linked to Missing Export: MSI.DLL.222' Error Message During Installation of the HP Director Software » Resolving 'Scanner not supported' or 'Unsupported operating system' Error Messages » Resolving Image Zone Install Error 1402, 1406, 1714, 1904, 1935, 2203, or Unknown Error » Error 'The System Cannot Find the File Specified' While Attempting to Install the HP Photo & Imaging Software in Windows 98, 98se, or Me » 'Cannot Install This Hardware - The Required Section Was Not Found in the INF' Error Message in Windows XP » 'Error Install Failure' Message for the hpznfx01.exe Software Module Displays on the Computer When Installing HP Image Zone » The message 'Fatal error during installation' or 'Error Install Failure' Occurs When Installing HP Image Zone » A 'Fatal Error' or 'Error_Install_Failure' Error Message Displays on the Computer When Installing the Image Zone Software » The Error Message 'Error_Install_Failure' or 'Fatal Error' Occurs when Installing Image Zone Software
Macintosh
» Mac OS: Software Driver Install Causes Error, "Interface Lib Get Component Resource Could not be Found" » 'Cannot Install This Hardware - The Required Section Was Not Found in the INF' Error Message in Windows XP » 'Scanner could not be initialized' Message Displays in Mac OS X when the All-in-One Software is Installed » Mac OS: Software Driver Install Causes Error, "Interface Lib Get Component Resource Could not be Found"