Question about HP LaserJet 4345mfp Printer

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HP Laserjet 4345MFP Backlight on printer display does not light. Counts up the 256MB memory then HP logo (3 sizes) appears (just visible) The 3 lights keep cycling on the display. Thats it, does nothing else. It has been left overnight and continues to display the logo and cycling 3 lights. Rear DC Cont Fan is turning. No other fans or activity with machine. When ADF/scanner/mfp or hard disk are disconnected it does recognise this and throws an error and asks for reboot. I have tried cold reset, nvram init. and hard disk init. but no difference. Your thoughts?

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HP Laserjet 4345MFP
Backlight on printer display does not light.
Counts up the 256MB memory then HP logo (3 sizes) appears (just visible)
The 3 lights keep cycling on the display. Thats it, does nothing else.
It has been left overnight and continues to display the logo and cycling 3 lights.
Rear DC Cont Fan is turning. No other fans or activity with machine.
When ADF/scanner/mfp or hard disk are disconnected it does recognise this and throws an error and asks for reboot.
I have tried cold reset, nvram init. and hard disk init. but no difference.
Your thoughts?

Posted on Sep 07, 2010

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Cold Start


Hi patricia_kin:
Hope this helps.

Cold reset
A cold reset unlocks menus that have been previously locked and resets all control-panel menu
items to the factory defaults. A cold reset does not clear the values in the service menu, such as the
serial number and the page counts.
NOTE Before performing a cold reset, print a menu map and a configuration page. See
Information pages. Use the information on these pages to reset customer-specific settings.
CAUTION All HP Jetdirect settings are also reset. Be sure to print a configuration page
before performing a cold reset. Make note of the IP address that is listed on the Jetdirect
configuration page. You will need to restore the IP address after performing a cold reset. See
Configuring and verifying an IP address.
To perform a cold reset
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