New PC was working fine but CPU/DRAM leds are now flashing

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yaya18

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Joined
Jul 26, 2021
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1
Hello everyone,

I recently bought various components to build my pc, I managed to install everything correctly and for about a week there was no issue with it.

However, 3 days ago when I booted my pc, nothing displayed on my monitor. So after checking inside I saw that the error leds for DRAM/CPU where flashing.

Before I explain further here are my specs :
  • OS : Windows 10
  • MB : ASUS ROG Strix Z490-A
  • CPU : INTEL Core i5 10600KF
  • GPU : MSI RTX 3070 Gaming x trio
  • RAM : 2x Corsair Vengeance PRO 16Gb 2666 Mhz
  • Watercooling : Corsair H100i RGB Platine
  • PowerSupply : COOLER MASTER MWE Gold V2 (750 W)
  • Case : BE QUIET! Pure Base 500DX
  • (2 monitors)
To try an resolve this issue here is what I have already tried doing :
  • Tested both RAM sticks in a friend's setup : working fine
  • Took out CPU and checked the pins : everything ok
  • Tried booting with only one monitor instead of two : did not resolve anything
  • Tried booting with only one RAM at the time and also by switching slots (And checked recommended slots in manual) : did not resolve anything
This is all I could do within my knowledge and that's why I am now asking you guys if you are able to help me.

I should maybe add that every component is brand new.

Thanks in advance
:thumbup2:
 
Joined
Mar 30, 2014
Messages
5,103
What I'd do is take it back down to bare bones out on a table. Nothing but
  • motherboard (on a non-conductive surface)
  • CPU (w/heatsink & fan)
  • RAM
  • PSU
  • video (including monitor)
  • keyboard and mouse

Now see if it will boot into the BIOS/UEFI. If not, try a different PSU and/or RAM. Once you do get into the BIOS/UEFI reset it to factory defaults.


If it's bootable now, try running an Operating System (*nix) from a bootable USB flash drive. Exercise it some (web) and then leave it running overnight.


If it's still where you left it the night before, power down, hook up your drive with Windows on it and try the same, (exercise it, web, games, whatever), and leave it running overnight.


If it's fine the next morning, power down and reassemble everything back in the case. As you continue beyond the bare minimum though, only add one or two pieces of hardware at a time and then test to make sure what was added isn't causing problems. You get the idea ...
 

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
44,693
If the out of case build is not successful, the first part I would swap would be the pw supply. You are right at minimum spec on the pw supply; the rtx3070 requires a minimum of 650W.
IMO it is never a good idea to go with minimum spec.
 
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