How to Troubleshoot VHU (Vision Head Unit)

Here are steps to help you troubleshoot common problems with a Vision Head Unit: 

Basic Checks:

Check Power Supply: 

• Ensure the head unit is properly connected to the power supply. 

Inspect Connections: 

• Ensure all cables (power, HDMI, USB, Ethernet Cable) are securely connected.
• Check for any visible damage to the wires and connectors. 

Reboot the Device:

• Reboot the device if the software doesn't boot-up

Application not bootup but green LED light glow:

Step:-1

• Make sure the power cable (5V Evalta connector) is properly connected.
• Please check the power cable output voltage using a Multimeter in DC voltage. There will be two pins in the power cable indicated with numbers 1 & 2. (Number 1 is positive & Number 2 is Negative). Refer Video titled- "VHU Voltage Check"

Open IMG-20231007-WA0006.jpg

• Make sure the green light inside the VHU (Pi board) is glowing. Refer video titled- "pi LED" 

• Reconnect all cables both VHU & Display end, then reboot the device.

• Disconnect the HDMI cable at the VHU end and connect the HDMI cable to the Laptop to test screen mirroring, and see if mirroring works. If doesn`t work try with a different HDMI cable.

• If mirroring works then follow the next steps. If mirroring doesn`t work follow display troubleshooting steps.

• Check if the Barcode scanner is turning on with light & sound.

• Connect the mouse directly to the VHU USB slot & check if the red light is glowing in the mouse.

Step:- 2

• Is "PI LED" is blinking??

• Find the LED from the right side air exhauster. Refer video titled- "pi LED"

Step:- 3

• If we know the static IP, ping the IP & check if "pi" is responding.

• Make sure to connect the vMeasure device & laptop on the same network.

• ping <vMeasure system IP>

• Check the response

• Contact the vMeasure admin team.