Chickenpox is caused by the virus known as varicella-zoster. This virus can spread easily. You can become infected with chickenpox if a person that has the virus coughs or sneezes on you. You can also contact chickenpox by touching the fluid from a chickenpox blister and by sharing food or drinks.
The internal HP printer self-tests, including Tap 10[ test, can be used to verify cartridge nozzle performance and that the. printer's internal firmware is functioning properly. The Tap 41/43 diagnostic tests can provide valuable cartridge/printhead.
NOTE: If test page prints then the printer is functioning normally and the problem can be isolated to an ink cartridge. Replace ink cartridge and retest. Deskjet 500, 510, 520 series printers (HP 26 black ink cartridge) Deskjet 550c, 560c series printers (HP 25, 26 ink cartridges)