After replacing the CPU, why does the computer make two short beeps when it is turned on?

We often hear various "beep" sounds from the small speakers on the chassis when the computer is turned on. In fact, this is the computer sending information to us. The meaning of the "beep" sound of different types of BIOS is different. The following lists the meanings of two common BIOS power-on self-test beeps for your reference.

AMI BIOS

1 short beep: Memory refresh failed.

2 short beeps: Memory ECC verification error.

3 short beeps: The system basic memory (the first 64KB capacity) failed to self-test.

4 short beeps: System clock error.

5 short beeps: CPU error.

6 short beeps: Keyboard controller error.

7 short beeps: The system real mode is wrong and cannot enter the protection mode.

8 short beeps: Memory error is displayed (such as memory corruption).

9 short beeps: Motherboard FlashROM or EPROM verification error (for example, the BIOS is damaged by CIH virus).

1 long 3 short beeps: memory error (such as memory chip damage).

1 long 8 short beeps: Display system test error (such as poor contact of the monitor data cable or graphics card).

Award BIOS

1 short beep: The system starts normally.

Two short beeps: General error. You should enter CMOSSETUP and reset incorrect options.

1 long beep and 1 short beep: There is an error in the memory or motherboard.

1 long beep and 2 short beeps: Monitor or graphics card error.

1 long beep and 3 short beeps: keyboard controller error.

1 long beep and 9 short beeps: Motherboard FlashRAM or EPROM error (for example, the BIOS is damaged by CIH).

Continuous long "beep" sound: The memory is not inserted properly or the chip is damaged.

Continuous beeping: The monitor is not connected to the graphics card.

Repeated short "beep" sounds: The power supply is faulty.

No "beep" sound and no display: the mainboard power is not connected, or the power supply is damaged.

From your situation, it may be a memory problem. It is recommended to check whether the memory is tightly plugged in or damaged