Question Red Light Blinks 3 times on MOBO (MSI B450 Carbon AC)

[_LoFi]

Hello,
I have bought a new case for my PC and have installed the motherboard along with all my original components. The PC worked without any issues previously. After installing all of the components in the new case I attempted to boot the pc however a red light near the IO shield blinks 3 times and nothing happens, i have attempted to start the PC several times using the power button of the case has been plugged into the motherboard and attempted to start it using a screw driver and touching the two pins, all of these attempts failed with the same Red light blinking 3 times. I have also tried to do a CMOS reset by taking out the small battery out of the motherboard and waiting 5-10 minutes, I have did this three times and the same red light shows. I have tried to boot the pc by disconnecting all of the Fans which were plugged into the motherboard but no result. I have also tested my power supply unit using the paper clip test which turns out that the power supply works as intended. Here is a list of my components:

• CPU - Ryzen 2700x
• GPU - RTX 2070
• MOBO - MSI B450 Carbon AC Gaming Pro
• RAM - 16GB Corsair Vengeance RGB Pro
• PSU - Cooler Master 700W
• CPU Liquid Cooler - Cooler Master

Please help, I’ve spent the entire day doing this as I’m a little bit inexperienced since I’ve never built this PC (got it from a friend of mine).

The PSU is nearly 13 years old however the paperclip test shows that it probably works as intende, it worked fine previously so I don’t see any reason why it would suddenly stop.

 

[white.a.drew]

Hello,
I have bought a new case for my PC and have installed the motherboard along with all my original components. The PC worked without any issues previously. After installing all of the components in the new case I attempted to boot the pc however a red light near the IO shield blinks 3 times and nothing happens, i have attempted to start the PC several times using the power button of the case has been plugged into the motherboard and attempted to start it using a screw driver and touching the two pins, all of these attempts failed with the same Red light blinking 3 times. I have also tried to do a CMOS reset by taking out the small battery out of the motherboard and waiting 5-10 minutes, I have did this three times and the same red light shows. I have tried to boot the pc by disconnecting all of the Fans which were plugged into the motherboard but no result. I have also tested my power supply unit using the paper clip test which turns out that the power supply works as intended. Here is a list of my components:

• CPU - Ryzen 2700x
• GPU - RTX 2070
• MOBO - MSI B450 Carbon AC Gaming Pro
• RAM - 16GB Corsair Vengeance RGB Pro
• PSU - Cooler Master 700W
• CPU Liquid Cooler - Cooler Master

Please help, I’ve spent the entire day doing this as I’m a little bit inexperienced since I’ve never built this PC (got it from a friend of mine).

The PSU is nearly 13 years old however the paperclip test shows that it probably works as intende, it worked fine previously so I don’t see any reason why it would suddenly stop.

Something isn't seated right or plugged into the right place and to stop it from frying the of stopped the post. Disassemble the whole PC minus the CPU and cooler. Reseat just the ram and PSU cables try posting the system to bios.

 

[_LoFi]

Something isn't seated right or plugged into the right place and to stop it from frying the of stopped the post. Disassemble the whole PC minus the CPU and cooler. Reseat just the ram and PSU cables try posting the system to bios.

Tried that, same issue. im going to re-insert the cpu and see if that does the trick. Many thanks

 

[_LoFi]

Nope, cpu re-insertion didn’t work. I guess I have to wait for a new PSU to arrive.