Media Test failure

[dheerajvengoden]

Realtek PCIe FE Family Controller series v1.25
PXE-E61: Media test failure, Check cable
Reboot and select proper Boot device

Can anybody help me with this problem. I have been unable to identify what the problem is. As soon as I open my computer i come up against this message on my monitor.
I didn't use my computer for like 3 to 4 months due to my monitor being damaged. After repairing my monitor i have encountered this problem. I have checked the connections inside the [strike]CPU[/strike] computer and everything seems to be fine. There is no problem with the fan.
Please help
Thank you

 

[Obakasama]

You don't mention the specs of the system. First search result from Google suggests it's a NUC: https://www.intel.co.uk/content/www/uk/en/support/articles/000023015/mini-pcs.html

 

[SkyNetRising]

Disable PXE boot (boot from lan).
It looks like BIOS settings have been reset. Possibly BIOS battery has died and needs replacing.