First, turn on the nozzle and see how it splits.

If there is a high-voltage fault, let’s check if there is ink accumulation on the high-pressure deflection plate.
If there are any, we will clean them thoroughly and blow dry them. Then turn it on.

If the point splitting is good, the high-pressure deflection plate is clean, and the viscosity is normal, but the high-pressure fault is still reported, we need to replace the high-pressure package.

If replacing a high-voltage package still doesn’t work, then we need to replace the motherboard

It is also possible that there is a problem with the motherboard, and so on.