Pc is no longer posting

[BunnyHunter67]

This is not my pc it is a friends. (r9 280 as rock z77 extreme 4 cx750m i5 2400 8 gigs of hyper x kingston gddr3) When the  power button is hit the lights on the mobo light up, the fans spin up. The monitor does not detect anything. The pc will stay booted for a few seconds like this then shut itself down and try again. It is beyond me what to do to trouble shoot this. previously when he turned on the pc windows would try to update, fail and then retry until it gave up and started like normal. (no clue if that has something to do with it) thanks for the help!

[Enderman]

 

[BadWolf-]

Have you tried clearing CMOS then rebooting?

[BunnyHunter67]

Just now, BadWolf- said:

Have you tried clearing CMOS then rebooting?

How would I do this? And what is cmos?

[BadWolf-]

By clearing CMOS you are resetting the BIOS to it's defaults This shouldn't effect the computer unless you have changed a boot order but that is easily fixedonce you get the PC to Post. 

 

To clear CMOS you need to find two pins on your motherboard labled cmos or clear cmos check the manual to find these if you can't see it on the board then with something metal connect those two pins whilst the pc is off but plugged in and powered

[BunnyHunter67]

2 minutes ago, BadWolf- said:

By clearing CMOS you are resetting the BIOS to it's defaults This shouldn't effect the computer unless you have changed a boot order but that is easily fixedonce you get the PC to Post. 

 

To clear CMOS you need to find two pins on your motherboard labled cmos or clear cmos check the manual to find these if you can't see it on the board then with something metal connect those two pins whilst the pc is off but plugged in and powered

So I would just bridge the two cmos pins with a screwdriver or something like that?

[BadWolf-]

Yeah just be careful not to touch anyother pins or contacts just the two cmos pins

 

[BunnyHunter67]

2 minutes ago, BadWolf- said:

Yeah just be careful not to touch anyother pins or contacts just the two cmos pins

 

Sorry to keep quoting but I just want to be 100% sure in what im doing. So I should have the pc in the boot loop when I do this?

[BadWolf-]

No the computer should be plugged in but not booting

 

[BunnyHunter67]

2 minutes ago, BadWolf- said:

No the computer should be plugged in but not booting

 

How do I tell if it worked? just wait a bit then start the pc back up?

 

[BadWolf-]

Once you have connected the pins you should then try and reboot the computer 

[BadWolf-]

boot it normally see if anything has changed

 

[BadWolf-]

Any Luck?

 

[BunnyHunter67]

1 minute ago, BadWolf- said:

Any Luck?

 

As I said its my friends pc he was busy but he did connect the two pins before he left. I will let you know when he gets back and powers up the pc.

[BunnyHunter67]

1 hour ago, BadWolf- said:

Any Luck?

 

Reseting the cmos fixed it. Thank you a ton!

[BadWolf-]

That's alright CMOS is the most common problem if a computer won't post.