Every time your printer cleans its printhead or primes the ink lines, it flushes a small amount of ink. This waste ink does not disappear; it drains into a physical sponge located at the bottom of the printer called the . Why the Printer Locks Up

This means the software cannot talk to the printer. Check your USB connection, make sure the printer is turned on, and ensure you selected the specific USB port in the software settings instead of "Auto Selection."

Direct USB cable connection (Wi-Fi resets are not supported).