Coombs' test involves taking a blood sample which is checked for the presence of antibodies which may destroy red blood cells.
You can use the HP Print and Scan Doctor to test the status of the printer spooler, print queue, device manager, and device conflicts. 1  On the desktop, double-click the HP Print and Scan Doctor icon to open the tool. 2  Click Start on the Welcome screen. 3  Select your printer, and then click Next.  Click Fix Printing.
Scan to a computer. To scan a photo or document from the control panel to your computer, make sure that the computer is on, the full-feature printer driver is installed, and the HP printer is connected to the computer with a USB cable or over your local wireless network.Step 1: Load the photo or document.hen you save settings in the HP Scan software, the settings are transferred to the shortcuts on the printer control panel, provided the computer is connected to the printer. Create a custom scan shortcut. Creating a new scan shortcut lets you create and save your own personal scan settings.