Did you check all your cables and power cords to make sure they were properly connected? Is the driver properly installed? If so, try turning off the printer, reboot, then turn the printer back on, and see if it works then.
I rebooted the printer it I still get that error I think it's because the computer doesn't detect the hp psc 750 as a scanner just as a printer
should I uninstall the driver and reinstall again
Did you install from the CD that came with the psc? I used a driver for my psc that I downloaded from the internet, but that was *only* for the printer part of it. I had to use the CD to get the scanner and copier (and fax) capabilities.
download it somewhere. also, i dont want to be harsh about it, but can you try to keep your questions relating to the same product, to the same thread?