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5-12 Machine Cannot Be Turned On

FLUX Support Team
  • Updated

Description

There are several reasons why a machine may fail to power on, including system failure, screen malfunction, or issues with the USB-C cable, RK control board, power adapter, mainboard, fuse, and other factors. 

Please follow the steps below for troubleshooting.

Possible Causes

  1. System failure (Update firmware, restore factory settings, or re-flash the RK control board).
  2. Problem with the USB-C connection cable.
  3. Connection cable is not correctly plugged in.
  4. The touchscreen itself is damaged. 
  5. RK control board failure.
  6. Mainboard failure.
  7. 12V power supply failure.

Tools

  1. Phillips Screwdriver (Optional)
  2. T8 Torx Screwdriver (Optional)
  3. Flathead Screwdriver (Optional)

Step 1

Check if the Emergency Stop button is pressed, which may cause the inability to power on.
(Ensure the button is NOT pressed)

 

Confirm the result and determine the next action:

  • Button is not pressed >> Step 2
  • After rotating and releasing the button, it powers on >>  Problem Solved

Step 2

Switch to a different power outlet to see if the machine can power on.

 

Confirm the result and determine the next action:

  • Yes, the machine powers on normally. >> Problem Solved
  • No, the machine still cannot power on. >> Step 3

Step 3

Confirm if the rocker switch is ON and if the indicator light is lit.

Rocker Switch Light ON (Normal) Rocker Switch Light OFF (Abnormal)

 

Confirm the result and determine the next action:

  • Yes, the light is lit. >> Step 4

Step 3.1

Use a tool or your fingernail to remove the fuse holder shown in the red box. Check if the internal fuse has burn marks. If it does, you can use the spare fuse inside the holder as a replacement.


 

Confirm the result and determine the next action:

  • Yes, the machine powers on. >>  Problem Solved
  • No, the machine still cannot power on. >> Contact Support 
    • Possible Causes:
      1. The machine's power socket is faulty.
      2. Both fuses are faulty.

Step 4

Confirm if the power button indicator light is lit.

Light ON Light OFF

 

Confirm the result and determine the next action:

  • Yes, the power button light is constantly ON. >> Step 5
  • No, the power button light is OFF. >> Contact Support 
    • Possible Causes:
      1. Power button failure.
      2. AC circuitry failure.

Step 5

Confirm the status of the four indicator lights on the mainboard.

There are four orange LED lights on the mainboard, representing the status of different components.

  • Loosen the Phillips screws on the side to open the side cover.
  • Please refer to the photo below. The indicators represent the status of different power sources: [USB-C(5V), 3.3V, 5V, 12V].
    It is normal for the 24V LED to remain unlit.

 

 

Confirm the result and determine the next action:

  • All indicators are constantly ON >> Step 6
  • Indicator(s) flashing or OFF >> Contact Support
  • Possible Causes:
    1. Mainboard failure (replacement needed).
    2. 12V power supply failure (replacement needed).
    3. DC cable failure (replacement needed).

Step 6

Confirm if the screen backlight is ON.

Backlight ON Backlight OFF

 

Confirm the result and determine the next action:

  • Yes, there is backlight. >> Step 7

Step 6.1

  • Turn off the machine. Open the side cover with a T8 Torx screwdriver.
  • Reconnect the Type-C cable connecting the screen and the mainboard. (Ensure it is plugged back in with the same orientation.)

  • Restart the machine and check if the screen backlight is lit.

Confirm the result and determine the next action:

  • Backlight is ON, machine powers on successfully. >> Problem Solved
  • Backlight is ON, machine still fails to power on. >> Step 7

Step 6.2

This step involves re-seating the screen's internal ribbon cable.

  • Use a Phillips screwdriver to remove the four screws from the RK board and remove the board.

  • Reconnect the screen ribbon cable and the Type-C cable (the white dot must face upward).

  • Re-secure the RK board and restart the machine.

Confirm the result and determine the next action:

  • Backlight is ON, machine powers on successfully >> Problem Solved
  • Backlight is ON, machine still fails to power on >> Step 7

Step 6.3

When powering on, confirm if the blue LED on the RK board is lit.

Confirm the result and determine the next action:

  • Blue LED is ON. >> Contact Support 
    • Possible Causes:
      1. Screen malfunction.
      2. USB-C cable failure (Low probability).
      3. RK board failure (Low probability).
      4. Mainboard failure (Low probability).
  • Blue LED is OFF. >> Contact Support 
    • Possible Causes:
      1. USB-C cable failure.
      2. RK board failure.
      3. Screen malfunction (Low probability).
      4. Mainboard failure (Low probability).

Step 7

Try re-flashing the system to see if the machine powers on normally.
Re-flashing the system / Re-flashing the RK board

*Note: This step requires a Windows computer and involves complex operations. If you are not familiar with electronic devices, it is recommended to skip this step and contact customer service directly.

 

Confirm the result and determine the next action:

  • Machine powers on successfully >> Problem Solved
    • Possible Cause: System failure.
  • Machine still fails to power on >> Contact Support
  • Possible Causes:
    1. RK board failure.
    2. Screen malfunction.
    3. USB-C cable failure.

Contact Support

*The information collected in this article, such as photos or videos showing your machine's problem, will need to be shared with the dealer or FLUX technical support team.

 

#END

 
 

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