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.
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, a wired (Ethernet) network cable, or over your local wireless network.elect your network folder and scan the item. On the printer control panel, touch the Scan icon (). Touch Network Folder to scan to the connected computer. Touch the name of the network folder that you created, enter the password if prompted, and then scan the item.