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.
From the Start menu on your computer, click All Programs, and then click HP. UnderHP ENVY 5530 e-All-in-One series, click HP ENVY 5530 e-All-in-One series, click the Help button,and then double-click HP Print and Scan Doctor.Learn more about how to solve scan issues.Click here to go online for more information.Learn how to solve copy issues.able of contents 1 HP ENVY 5530 e-All-in-One series Help .......................................................................................................... 12 Get to know the HP ENVY 5530 series ............................................................................................................