Question My computer won't post

Dec 18, 2021
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Hello there. I have an old computer. It was working perfectly fine until last month.

After pressing to power button system turns on for 5 seconds and suddenly shuts down and starts running again but never posts.

For troubleshooting i have tried these:
1)Tried booting with different CPU
2)Tried booting with different GPU
3)Tried RAMs on different slots
4)Tried every single RAM
5)Tried PSU on different system. Works perfectly fine.
6)Checked if there's something that can short the motherboard.
7)Cleaned the system
8) Tried CMOS reset

None of them worked. My bet is motherboard is dead but i'm not completely sure.

If it's required, system specs:
CPU: Intel Xeon X5450 C0 3.00GHz
Motherboard: ASUS ROG Commando
GPU: AMD Radeon R9 280X 3GB GDDR5 384-Bit
RAM: 6GB DDR2 800MHz CL6 Kingston (1GBx2 2GBx2)
HDD: Samsung HD250HJ 250GB 7200RPM
PSU: Gigabyte P650B 650W 80+ Bronze
OS: Windows 11 Pro 64-Bit
 
Hello there. I have an old computer. It was working perfectly fine until last month.

After pressing to power button system turns on for 5 seconds and suddenly shuts down and starts running again but never posts.

For troubleshooting i have tried these:
1)Tried booting with different CPU
2)Tried booting with different GPU
3)Tried RAMs on different slots
4)Tried every single RAM
5)Tried PSU on different system. Works perfectly fine.
6)Checked if there's something that can short the motherboard.
7)Cleaned the system
8) Tried CMOS reset

None of them worked. My bet is motherboard is dead but i'm not completely sure.

If it's required, system specs:
CPU: Intel Xeon X5450 C0 3.00GHz
Motherboard: ASUS ROG Commando
GPU: AMD Radeon R9 280X 3GB GDDR5 384-Bit
RAM: 6GB DDR2 800MHz CL6 Kingston (1GBx2 2GBx2)
HDD: Samsung HD250HJ 250GB 7200RPM
PSU: Gigabyte P650B 650W 80+ Bronze
OS: Windows 11 Pro 64-Bit
Probably the motherboard, maybe try reflashing the bios chip using a programmer?