Hardware :: HP Scanner No Longer Works With Snow Leopard?

I just upgraded to Snow Leopard (OS 10.6.1). I have an HP DeskJet F4280 All-In-One. It used to work great under 10.5.x, but now it will print fine but not scan.

If I launch HP Device Manager, and double-click Scan Picture, HP Scan Pro window opens, but I get the following error: Sorry, scanner could not be initialized (Scanner not found.).

If I press the hardware Scan button on the top of the unit itself, the power light blinks rapidly for about 10 seconds, then reverts to its normal state, and nothing else happens.

If I launch Image Capture 6.0(424) I get this error: No camera or scanner connected.

Under System Preferences>Print & Fax>Scan a window opens that reads HP Deskjet F4200 series and I click on Scanner, but it says No scanner selected.

However, System Profiler lists Deskjet F4200 series under USB High-Speed Bus, and, as already mentioned, the printer works fine.