¶ Issue Description
After powering the printer, the touch screen cannot be enabled.
¶ Reasons
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The power supply voltage is set incorrectly.
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Insert a TF card before powering on the printer.
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The motherboard or the touch screen is damaged.
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The power supply is damaged.
¶ Troubleshooting Steps
¶ Tools needed for toubleshooting
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A 2.0 mm Allen key
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A 2.5 mm Allen key
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A multimeter
¶ Step 1 Check the voltage of the power supply
Note: Before operation, turn the power switch off (symbol "〇") and unplug the power supply cable. If the power supply voltage is incorrectly set, the printer's touch screen cannot be enabled and this may even cause damage to the power supply.
¶ Step 2 Check the fuse of the power switch
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Plug in the power supply cable. Turn the power switch ON (symbol "|") .
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Check whether the power switch indicator can light up normally.
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If the power switch indicator light is not illuminated, it indicates that the fuse in the power switch is damaged. Purchase a new fuse from a hardware shop and replace the old fuse with a new one. The specification of the fuse for the power switch is 10A 250V AC.
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After unplugging the power supply cable and turning the power switch off, slide the snap in the direction of the arrow to remove the fuse.
¶ Step 3 Remove the TF card and reboot the printer
Do not insert the TF card before powering on the printer.
If the touch screen cannot be enabled and the TF card is inserted, remove the TF card and reboot the printer.
¶ Step 4 Check whether the touch screen plug is loosely connected
- Turn the power switch OFF (symbol "〇") and unplug the power supply cable.
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Release and remove the four screws securing the back cover of the touch screen with a 2.0 mm Allen key. Remove the back cover.
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Re-insert the three marked plugs on the back cover of the touch screen.
¶ Step 5 Check that the motherboard indicator can light up normally
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Turn the power switch OFF (symbol "〇") and unplug the power supply cable.
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Release and remove the five screws securing the bottom cover with a 2.0 mm Allen key. Remove the motherboard cooling fan plug and the bottom cover.
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Plug in the power supply cable. Turn the power switch ON (symbol "|") .
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Check whether the indicator light on the motherboard can light up after the printer is powered on．
- If the motherboard indicator light can illuminate, it indicates that the power switch or the motherboard is damaged. Refer to Step 6 for further troubleshooting.
¶ Step 6 Check whether the power supply can output voltage
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Plug in the power supply cable and turn the power switch ON (symbol "|").
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Set the multimeter to 200 V DC and test whether the power supply port on the motherboard has a voltage of 24 V DC.
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If the input voltage at the power supply port is not 24 V, it indicates that the power supply needs to be replaced.
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If the input voltage at the power supply port is 24 V, it indicates that the motherboard and the touch screen need to be replaced.
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If the multimeter is not available, check whether the power switch indicator can light up normally. If the power switch indicator does not light up normally after the printer powers on, it indicates that the power supply needs to be replaced.
¶ Step 7 Check whether the motherboard or the touch screen is damaged
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Turn the power switch OFF (symbol "〇") and unplug the power supply cable.
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Confirm that the X-axis motor plug is inserted into the X-axis motor.
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Move the extruder rapidly from side to side to see if the touch screen lights up when the extruder moves quickly.
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If the touch screen can be enabled normally, the power supply needs to be replaced.
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If the touch screen cannot be enabled normally, the motherboard and the touch screen need to be replaced.
(The testing steps for the Neptune series of printers are the same.)
