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Edge Computer is not fully serviceable
If possible, Connect the device to a keyboard and monitor If the troubleshooting is being undertaken "in the field", it may not be possible to connect a monitor and keyboard. In which case, just undertaken Steps 1 to 3 below. If these tests are being undertaken offline in a "lab" or a test bench, then undertake all the tests.
Step 1 – Check the Edge Device can be turned on Most devices have a Power LED". Check if the LED power light turns on, when the device is connected to power. If the LED is NOT on, please check the power supply.
Step 2 – Check the Network Boot the machine and check if the network card lights are on, flashing or off. If so, note down the color of the LED. If the networking LED seems to be steady or flashing when an Ethernet cable is connected, try and ping the device from a device on the same network. Generally, Ardexa Devices are configured for 'dynamic' addressing (DHCP), so the router will allocate it an address that lasts for anywhere between 1 day and 1 month (usually). To get the current address, query the router. Most routers will list all connected devices, and sometimes include the 'host-name'. The host-name for all Ardexa Devices is 'ardexa'. If your Ardexa Device has a static address, simply use that address. Once you have the IP address, try to ping the device using a machine on the same network.
Step 3 – Try and connect via a tethered USB connection Read on how to tether your mobile phone to the Ardexa device. Discconnect any Ethernet connections, then tether the Ardexa device to your phone. This will allow your device to connect to the Ardexa cloud, via the tethered USB connection on your phone. Be aware you may need to wait up to 5 minutes, particularly if phone reception is poor. This also tests the USB port.
Step 4 – Use the Monitor to see if the Edge Device can boot successfully. Re-power the edge device with a monitor connected, and check for a normal boot sequence. If it does boot (that is; a login prompt appears), look for any bad (RED) messages in the boot process, and note them down. If it doesn't boot correctly, try and boot it from a bootable USB device. This may be ArdexaLinux or any other Linux distro. Make sure the USB device is bootable and set the BIOS to boot from the USB device.
Step 5 – Try and Login to the Edge Device. Try and login to the device prompt using the Ardexa supplied credentials, via the monitor and keyboard. Note down any messages that may appear, which may indicate a problem with the device, the operating system or the configuration.
Step 6 – Test the Serial Ports . Ardexa has developed a plugin to test the serial port. You don't have to use this plugin, you can use whatever tools you have at your disposal. But all serial ports must be tested. This includes the USB ports, if they are being used as serial ports.