Red Light Under Bios_A1?

DB2Brown

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Aug 5, 2015
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I built a new pc in June and it has been working fine until a few days ago. I left it on sleep mode and the next morning it wouldnt start. The fans would turn on and the case lights would turn on, but my mouse and monitor would stay off. Ive narrowed it down to being the CPU or Motherboard. I tested 3 Psu's all working (one was brand new) a different set of Ram that i used in my old pc, and i tested my hardrive on a different pc also. I also noticed a red light on the motherboard the said Bios_A1. I just want some advice from someone with more experience before i send a part back.

Specs:
CPU: i5-4690k Devils Canyon
RAM: G.Skill Sniper Series 8GB
Motherboard: ASRock Fatal1ty z97 killer
Psu: Corsair cx750m
OS: Windows 8.1
 
If it`s still not booting then the problem was with what you setup in your bios.
Related to the s type of power mode you have selected in it.
A lot of devices do not like it if you have the wrong S mode setup in your bios.
Set the S mode option in the Apci section of the bios to S1-S3 mode.

Because of this it may of triggered one of your circuit protection modes of your PSU. The board will remember the last power error. New mobos do a power stability check.
So put the PSU you had in. plug the cord into the wall socket leaving the switch in the off position on the wall socket.
Make sure you have your eight pin from the Psu connected to the eight pin of the motherboard, and it snugly fitted.
Remember that the board will not post fully if the eight pin 12v extra Atx feed is not connected to the board from the PSU.

On the back of the Psu flick the rocker switch to its off position.

Turn the wall socket switch on. then the rocker switch on the back of the PSU.
Press the power button on the tower see if the system powers up.


 

DB2Brown

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Aug 5, 2015
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Im not even able to get to bios my computer doesnt show anything on the monitor. It stays blank and then about a minute later it reboots and does the same thing.
 
Are you sure the board has not defaulted to the on board video solution of the motherboard.
The board may of factory defaulted the bios.
So is now using the video ports of the motherboard, if you have a Pci-e graphics card in the slot of the motherboard.
You never mentioned if a Pci-e based graphics card was fitted in your system.

Now I know as part as a test on some boards if there is no connection to a monitor to the video card ports of the motherboard for example it sometimes does not post the system. Its just a thought. you could give that a try.
Or leave it set up like it, and reset the bios back to factory defaults and see if that gets the board to post.

You should then with luck get to the bios screen, off the splash screen by F2 or F12.

It would indicate that if you have a Pci-e based card it could be the problem.



 

DB2Brown

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Aug 5, 2015
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Im using the mobos video ports also ive taken my gpu out and it does the same thing.