Crosshair Formula IV | Post State LED: CPU_LED red

lwrand

Reputable
Jun 7, 2015
4
0
4,510
Hi everyone,
I really hope that the problem I'm about to share is bound with the PSU, but I'd like to read your opinions. Basically, my PC turned off suddenly, while it was running a game - I checked the LEDs on the motherboard and the "CPU_LED" was red, then I tried to reboot it, but the same led was still on. I started to think on the possible solutions so I left the PC there for almost 5 hours with the power supply disconnected.
When I came back to try, the led was not red anymore but, after like 45 seconds, the machine turned off again with the same red led on the "CPU_LED". Since I couldn't use my PC I took the opportunity to refresh the thermal paste on the CPU and clean the inside from the dust.
Now, I just tried to turn it on, and again, I could start the PC, and enter the BIOS, just to check temperatures and so on (My AMD Phenom II X6 1090T was running at 34 degree C, so nothing wrong here) but after like one minute, the PC went off with the same "CPU_LED" on.

Tomorrow I'll try to replace the PSU and see how it goes, but what're your thoughts ?

Specs:
CPU AMD Phenom(tm) II X6 1090T
Motherboard Asus Crosshair IV Formula
RAM 8GB G.Skill DDR3-2000 PC3-1600 2048MBx4 F3-16000CL9D
Graphics Card Sapphire VAPOR-X HD5850 1GB GDDR5 PCIE
PSU: CoolerMaster GX 750w

Many thanks,
/lwrand.
 
Solution
Phenom II only supports 1333MHz DDR at least, officially. Since you do manage to get your RAM running over 1333MHz., your system can appear to be fine and might even pass Memtest and other benchmarking utilities successfully. However, AMD have discovered that, in certain scenarios, the system may fall over after a period of use, depending on system usage and if you are stressing the CPU. This normally indicates a problem with the Memory Controller and you may need to replace your CPU if this happens
Phenom II only supports 1333MHz DDR at least, officially. Since you do manage to get your RAM running over 1333MHz., your system can appear to be fine and might even pass Memtest and other benchmarking utilities successfully. However, AMD have discovered that, in certain scenarios, the system may fall over after a period of use, depending on system usage and if you are stressing the CPU. This normally indicates a problem with the Memory Controller and you may need to replace your CPU if this happens
 
Solution

lwrand

Reputable
Jun 7, 2015
4
0
4,510
Thanks for your feedback Calvin7.
It was the PSU - After 4 years my CoolerMaster GX 750w passed away (and the huge amount of dust I found below, gave it the final strike).