Just got new gaming computer turned on it updated the bios and had to restart it came back on a different screen came up a bios screen so went to exit it said exit without changes so I thought the update wouldn't take so another opinion said save and reset well after that the monitor won't turn on just say no device detected
Look for the 'SILVER CIRCLE' on your motherboard, take it out by pushing in on the side and pulling it out. Leave it out for like 5 minutes and then put it back in. Also there should be a cap on 2 pins near to it, take that off and put it onto the other pin next to it (all in all 3 pins) and then put it back in the place it was before.
This will / should reset the BIOS for you to the default values if you fucked something up in there somewhere