CPU debug LED on, no post

[Guest]

So this is the second time I built a PC. After building, connecting all the cables and trying to turn it on there was no output and the CPU debug LED was on.

My system specs are:

Ryzen 5 5600

MSI MPG B550 Gaming plus

MSI RX 6650XT MECH

1 TB Samsung 980 M.2

16 GB G.Skill Ripjaws 3600 CL18 DDR4 (dual kit)

BeQuiet 650 Watt System power 10

MSI MPG Gungnir 110r

 

After building and connecting the peripherals the fans were spinning and the rgb lighting was on. Though there was no output and the CPU debugging LED was on. The GPU and CPU were both getting warm. So I took the stock cooler back off and took the CPU back out of the socket. In the process some thermal paste got under the CPU pins. I got a toothbrush and some Isopropyl alcohol and (very carefully) brushed it out. There are no bent or missing pins.

Then I flashed the bios (GPU and RAM were still in the board) and reseated the CPU. Still no output and CPU LED still on.

I shorted the CMOS (you can see the pins I shorted in the picture) and flashed the bios again. Still nothing.

Then I took a different USB drive and tried it again... nothing. Though a weird thing is that the RGB lighting on the keyboard turns on but the one on the mouse doesn't. I tried two different mice.

 

Do you guys have any idea what I can try? I have a first gen ryzen CPU at home if that would be of any help.

 

[Whatisthis]

Try swapping the cpu. If it has the same error most likely culprit is the motherboard itself. 

[Guest]

I just tried a different kit of RAM: I just put in one 4gb stick of 2400 RAM and I got into the bios.

So is there any way that I can preset the RAM speed to a maximum of 3200 or something before I put in my actual RAM?

[Whatisthis]

10 hours ago, Gefriery said:

I just tried a different kit of RAM: I just put in one 4gb stick of 2400 RAM and I got into the bios.

So is there any way that I can preset the RAM speed to a maximum of 3200 or something before I put in my actual RAM?

If you are thinking it will boot with the ram it won’t boot with…not going to happen. Unless it was just seated badly to begin with in which case it will work when you reinstall it properly and you can change bios as normal.

 

bios defaults to 2133mhz on all new sticks of ram, which will work with all ram capable of a higher speed (I.e. it will always work at 2133 if it will work at 3200).

[Guest]

Issue solved: one of the RAM sticks is dead

On 5/28/2023 at 3:43 PM, Whatisthis said:

Try swapping the cpu. If it has the same error most likely culprit is the motherboard itself.