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Computer won't turn on but blue light flashes on motherboard

Last response: in Systems
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April 27, 2013 9:27:49 PM

After finishing my first build and feeling proud of myself, I hooked up a monitor expecting everything to work perfectly, and lo and behold, it doesn't turn on. After trying to power it on a few more times, I started realizing that when I press the power button, a small blue light would flash on my motherboard. However, the blue light will only flash the first time you press the power button after turning on the power supply. In order to get it to flash again, I have to reset the power supply and press the power button again.

Note, the LED that flashes is labelled LED1 and the motherboard manual says that this first LED indicates it is going into "power phase 1".

April 27, 2013 9:42:39 PM

Did you use ALL standoffs when you installed your mobo? If you did not it could be causing a short on the motherboard and preventing the system from booting.
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a b V Motherboard
April 27, 2013 9:59:43 PM

What motherboard do you have?
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April 27, 2013 10:07:11 PM

What about your RAM? Do you have two sticks? Try removing one and completely re-seating the other.

Have you tried removing the mobo and starting it outside of the case?
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April 27, 2013 10:09:52 PM

I have a single stick of RAM and have placed it into the DIMM slot 4 as my manual says you must. I have not tried building it outside of the case and really hope is not necessary.

I would like to mention that the sides on the 24 pin connector are not fully meeting the sides on the port which might indicate that it is not fully inserted but I cannot seem to push it down any further.
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April 27, 2013 10:11:32 PM

Hmmmm....try re-routing your 2-pin cable so it goes all the way in.
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a b V Motherboard
April 27, 2013 10:16:56 PM

thesuperguy said:
I have a single stick of RAM and have placed it into the DIMM slot 4 as my manual says you must. I have not tried building it outside of the case and really hope is not necessary.

I would like to mention that the sides on the 24 pin connector are not fully meeting the sides on the port which might indicate that it is not fully inserted but I cannot seem to push it down any further.


May be flip that around the plug has a clasp that is supposed lock on to the socket.
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April 27, 2013 10:18:44 PM

sorry, 24-pin.
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April 27, 2013 10:20:52 PM

Now that I think about it, I didn't hear a click when inserting the 24 pin... And I also tried inserting just the 4 pin attachment without the other 20 and it goes down quite a bit further than the entire thing ever did... I have a feeling my lack of strength may be the problem here.

EDIT: after a bit more inspection, I found that the part that is supposed to clip on is visibly not under the protruding part therefore not in place. Now I just need tips on how to push it down far enough. My thumbs and hands are probably developing blisters by now.

EDIT2: damn, I did eventually manage to get it to click but the problem persists.
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April 27, 2013 11:03:00 PM

This is very disappointing. I tried the paperclip test on my power supply but my fan merely twitches for a split second and does not actually spin. This is indicative of a dead power supply correct?
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