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.
Scanning a Photo. Turn on the HP scanning device and open HP Solution Center. Place the photo face-down on the scanner and close the lid to the scanner or printer. Click the âScan Pictureâ button. Select the âPicture to Fileâ option and then click the âScanâ button. Click the âFile Typeâ drop-down menu and select your preferred output format, such as BMP, JPEG or PNG.