Asus M5A99X EVO R2.0 RED CPU Led

[Toliss101]

Hello to everyone, I have an issue on my motherboard CPU  Led is red when I try to start PC.

What I tried:

-Changed Ram

-Changed CPU

-Changed SPU

-Changed GPU

-made Board testing

-reset Bios by jumper and by unplugging battery

Bought the same Motherboard - and it starts and worked for some time, but after 10 min, failed with the same issue...

all I tried with previous MB, I tried with new one without any result.

Any suggestions? 

[achugh]

Hi @Toliss101 did you connect both the 24-pin and 8-pin EATX connector to your board? I see you mentioned that you changed your PSU as well. Can you share from which PSU to what PSU did you change? When you changed the PSU did you change the power cables as well?

See PAGE 1-37 of your user manual at https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM3+/M5A99X_EVO_R2.0/E7428_M5A99X_EVO_R2.pdf?model=M5A99... 

[Toliss101]

Hello there. On my 11 years old motherboard is a problem with North Bridge. After additional tests with heating bridges, i found that north bridge has no reaction on heating. Also there are problems with energy supply of bridge. South one doesn`t have those problem. So I assumed, the problem is in North Bridge! So I just bought new motherboard(the same model), and compared results of Voltage and temperature with the same CPU,RAM and SPU set.

And YEP - the problem is a North Bridge!   

[achugh]

I am glad to hear that you have found your problem. Now that you have a replacement board, I hope everything will be working again for you.