is a hardware-level HALT error . Unlike a paper jam or toner low warning, this error stops the machine immediately. The CPU on the main board has lost communication with a critical slave processor (typically on the PCU PWB or a motor driver board) for longer than the allowed watchdog period (usually 5–10 seconds).

In the vast majority of cases, this error is tied to the or the Power Supply Unit (PSU) .

If the fuser and power supply are verified as working:

Sharp Send Error 80-0000

is a hardware-level HALT error . Unlike a paper jam or toner low warning, this error stops the machine immediately. The CPU on the main board has lost communication with a critical slave processor (typically on the PCU PWB or a motor driver board) for longer than the allowed watchdog period (usually 5–10 seconds).

In the vast majority of cases, this error is tied to the or the Power Supply Unit (PSU) .

If the fuser and power supply are verified as working:

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