There's probably a better place to post this but I'm new to this so here it goes...
I built a PC in January and today is the second time I have had this issue.
I have an ASUS P8Z77-V motherboard and when I power on my PC the BOOT_DEVICE_LED stays on and wont get past the BIOS screen.
The only way I have found to get around this is to use the BIOS Flashback feature to reinstall the BIOS. After this is done my PC works normally again.
I don't know what the issue is and it is hard to work out as it has only happened twice in over half a year.
Does anyone know what's going on?