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.
Press the Power button to turn on the pinter. Open the HP software. Windows XP. On the Windows taskbar, click Start (), click All Programs, click the HP folder, click the folder with the name of your printer series, and then click your printer.tep three: Select the scan type from the printer control panel. Follow these steps to scan from the printer control panel. On the printercontrol panel, touch Scan. Touch Computer to scan to the connected computer. Touch the name of the computer where you want to save the scan.