Random as to whether PC boots

[sergerold]

My PC was working absolutely fine and then one day it just refused to boot. Here are the different things it will do when you press the power button:

 

1. power on (fans etc), three loud beeps, no video,restarts within seconds
2. power on (fans etc), one to three loud beeps (its as if the three beeps get cut off), no video,restarts within seconds
3. powers on (fans etc), no beeps, no video, keeps powered on and then restarts within 20 or so seconds
4. boots fine - as all of the above restart then at some point it will boot ok but as soon as I decide to restart then I go through the process again

I'm now looking at Windows and temps seem ok. As does everything else.

 

What on earth is going on here?! If I had to guess I'd say a PSU fault?

 

Any advice is much appreciated!

[BlueChinchillaEatingDorito]

Beep codes are a sign of the system failing to POST and the specific codes are motherboard specific, what are your system specs?

[sergerold]

1 minute ago, BlueChinchillaEatingDorito said:

Beep codes are a sign of the system failing to POST and the specific codes are motherboard specific, what are your system specs?

Asrock X370 Itx, Ryzen 1800x, gtx 1080ti, 2 x 8gb corsair 3200

 

It seems 3 long beeps mean no memory but these seem like short beeps to me. also, if there was no memory, it shouldnt boot at all, right?

[BlueChinchillaEatingDorito]

1 minute ago, sergerold said:

Asrock X370 Itx, Ryzen 1800x, gtx 1080ti, 2 x 8gb corsair 3200

 

It seems 3 long beeps mean no memory but these seem like short beeps to me. also, if there was no memory, it shouldnt boot at all, right?

The meaning of these beep codes should be listed in your motherboard manual. Take a look. 

 

If there is no memory, it'll just beep and not post. There are beep codes for many different scenarios including missing/failed hardware.

[sergerold]

2 minutes ago, BlueChinchillaEatingDorito said:

The meaning of these beep codes should be listed in your motherboard manual. Take a look. 

 

If there is no memory, it'll just beep and not post. There are beep codes for many different scenarios including missing/failed hardware.

I've looked and there isn't (http://asrock.nl/downloadsite/Manual/Fatal1ty X370 Gaming-ITXac.pdf). I've looked online and can't see anything apart from the link in my previous post.

[BlueChinchillaEatingDorito]

3 minutes ago, sergerold said:

I've looked and there isn't (http://asrock.nl/downloadsite/Manual/Fatal1ty X370 Gaming-ITXac.pdf). I've looked online and can't see anything apart from the link in my previous post.

Interesting, that is basic troubleshooting information and it isn't on the manual for an enthusiast platform. Dammit ASRock. Anyways, I found them here:

http://www.asrock.com/support/faq.asp?id=286

 

3 Beeps is directing to a memory issue, more specifically, there isn't any. Have you tried booting the system with each individual stick of memory?

[sergerold]

23 minutes ago, BlueChinchillaEatingDorito said:

Interesting, that is basic troubleshooting information and it isn't on the manual for an enthusiast platform. Dammit ASRock. Anyways, I found them here:

http://www.asrock.com/support/faq.asp?id=286

 

3 Beeps is directing to a memory issue, more specifically, there isn't any. Have you tried booting the system with each individual stick of memory?

That does say long beeps and these were short. Also, often it didn't beep at all - I'm almost certain its not a memory issue (coincidentally I ran memtest for a few passes last night and it was fine).

 

It seems that the issue has just resolved itself. I've been able to boot 15/15 times - I am still concerned however and would like to know what the issue was.

 

EDIT: One thing I did notice is that speedfan shows 'System at 115c' - I'm assuming this must be an error? It's always been like this (I've got a new system).