Please help, system won't post (M5A99FX Pro R2.0 and FX-8350)

[drgreenthumb2025]

Put together a new system, but when I started it up it failed to post. The system has power and all the case fans and graphics card fans spin up when the system is powered on, but the Memory LED, the CPU LED and the boot device LED all flash red and then the fans turn off.

Here's a video of me starting the system up, in case I didn't describe it well enough
https://www.youtube.com/watch?v=1SeEuuDmaRM

I don't have a CPU cooler on the chip (I wanted to make sure the system posted before putting any kind of thermal compound on the CPU in case I had to remove it for whatever reason), but I tried to boot the system with the stock CPU cooler plugged in to it's fan header (cooler fan spins up, but then shuts down like the rest of the fans) and it still didn't post. I don't know if that will make a difference or not.

I've also gone back and checked to make sure I plugged everything in tightly.

AMD FX-8350
ASUS M5A99FX Pro R2.0
G Skill DDR3 1866 F3-14900CL8D-8GBXM
XFX Double D R9-280A-TDFD
XFX XTR Series P1-650B-BEFX
Kingston Hyper X Savage 240 GB SSD
Fractal Design R5

Any help you guys can offer would be greatly appreciated.

[Guest]

Its probably a dead motherboard happend to me to all the leds flashed red so i sent it back and got a new one and now it works

[KeltonDSMer]

You need to mount the cooler, it only takes a few seconds to hit thermal shutdown temps on the CPU without a heatsink.

 

Edit: BTW welcome to LTT @drgreenthumb2025 !

[pants18]

You need to mount the cooler, it only takes a few seconds to hit thermal shutdown temps on the CPU without a heatsink.

this ^

[drgreenthumb2025]

You need to mount the cooler, it only takes a few seconds to hit thermal shutdown temps on the CPU without a heatsink.

 

Edit: BTW welcome to LTT @drgreenthumb2025 !

 

I'll mount the cooler and try it again.  But with that being said, wouldn't all the other LEDs flash green and just the CPU LED flash red if it was due to the processor overheating?  And thank you for the welcome.

[Matt420740]

I'll mount the cooler and try it again.  But with that being said, wouldn't all the other LEDs flash green and just the CPU LED flash red if it was due to the processor overheating?  And thank you for the welcome.

Its hard to say what the LEDs will do with the CPU overheating so quickly.  Put the cooler on and try it again.  No PC is going to boot without a CPU cooler, due to CPU temps, fix that first then worry about the LEDs.  I suspect everything will be fine once the cooler is on, assuming the chip did its job and shut down before you fried it.......

[drgreenthumb2025]

Thank you guys for your help.  Turns out it was the cooler not being installed.  Once I installed it, the system booted without a problem.  Thanks again for the responses.