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.
Follow the on-screen instructions to connect the printer to the network. Step 3: Download and install the printer software. For the latest updates, HP recommends installing the most current version of the full feature printer software from the HP website.note: As an alternative method to downloading the software, you can use the installation CD.hen this link is clicked, HP Print and Scan Doctor is downloaded using your Internet browser's download capabilities. Step 2: Connect the printer to the network. Use the printer's built-in Wireless Setup Wizard to set up your printer on your wireless network.