What is the situation of 2 short alarms when the computer is turned on?

We often hear different sounds from the speakers of the chassis when the computer is turned on? DuDu? Sound, then what happens when the computer turns on two short alarms? Next, follow me to find out the solution of two short alarms when the computer is turned on.

The solution of two short alarms when the computer is turned on is caused by poor memory compatibility and will not damage the computer.

You can't turn it off. Memory with ECC check function is generally server memory. It has nothing to do with BIOS!

ECC memory is an error correction memory. Simply put, it has the function of finding and correcting errors, and is generally used in high-end desktop computers/servers and graphic workstations, which will make the whole computer system safer and more stable when working.

Memory is an electronic device, and errors will inevitably occur in the working process. For users with high stability requirements, memory errors may lead to fatal problems. Memory errors can also be divided into hard errors and soft errors according to their causes. Hardware errors are caused by hardware damage or defects, so the data is always incorrect, and such errors cannot be corrected; Soft errors occur randomly, such as sudden electronic interference near the memory and other factors may cause soft errors in the memory.

In order to detect and correct memory soft errors, what appears first is memory? Parity check? . The smallest unit in memory is a bit, also known as? Bit? A bit has only two states, which are marked as 1 and 0 respectively, and every 8 consecutive bits are called a byte. Memory without parity has only 8 bits per byte. If a bit in memory stores an incorrect value, the corresponding data stored in it will change, resulting in an application error. Parity check is to add one bit to each byte (8 bits) as a check bit. After storing data in one byte, the data stored in its eight bits is fixed, because these bits can only have two states, 1 or 0. Assuming that the stored data is marked as 1, 1, 1, 0, 1, then the parity bit is defined as 1 for even parity, otherwise it is 0; For odd parity, the situation is just the opposite. When the CPU reads the stored data, it will add the data stored in the first 8 bits again to see if the calculation result is consistent with the parity bit. So to some extent, memory errors can be detected, and parity can only detect errors but not correct them. At the same time, although the probability of double-bit errors occurring at the same time is quite low, parity can not detect double-bit errors.

ECC (error checking and correcting) memory, which also stores codes encrypted with data in extra bits of data bits. When data is written into the memory, the corresponding ECC code is also saved. When reading back the data just stored, the saved ECC code will be compared with the ECC code generated when reading the data. If the two codes are different, they will be decoded to determine which bit in the data is incorrect. Then this error bit will be discarded and the memory controller will release the correct data. Corrected data is rarely put back into memory. If the same error data is read out again, the correction processing is performed again. Rewriting data will increase the processing overhead, resulting in a significant decline in system performance. If it is an error caused by a random event rather than a memory defect, the wrong data of this memory address will be replaced by other data rewritten.

The memory with ECC check will have a great impact on the performance of the system, but this kind of error correction is very important for applications such as servers, and because the memory with ECC check is much more expensive than ordinary memory, most of the memory with ECC check function is server memory.

The meaning of computer boot prompt. The computer began to hear various beeps from the chassis speakers. In fact, the computer sent me the same message. The meaning of BIOS beep is the same. Please refer to the meaning of the BIOS machine self-test prompt tone for your reference.

AMI BIOS

1 beep: Memory refresh failed.

Bell: Error in memory ECC check.

3 chime: the self-test of the system basic memory (capacity 164KB) failed.

4 short bells: system clock error.

5 short chimes: CPU error

6 bell: keyboard controller error.

7 Short beep: In case of real mode error, the system can enter protection mode.

8 bell: display memory error (display memory damage).

9 chime: motherboard FlashROM or EPROM check error (for example, BIOSCIH virus damage)

13 beep: memory error (for example, memory chip is damaged)

18 beep: display system test error (display data cable or graphics card is in good contact)

Reward BIOS

1 bell: the system is on.

2 short beeps: the instrument error should be reset in CMOSSETUP.

1 beep 1 short beep: memory or motherboard error.

1 beep 2 short beep: display or graphics card error.

1 chime and 3 short chimes: keyboard controller error.

1 chime and 9 short chimes: Flash or EPROM error on the motherboard (for example, BIOSCIH is damaged).

Intermittent beep: Memory is not inserted or chip is damaged.

Stop sound: The monitor is not connected to the video card.

Repeated short beep: power failure

Beep and display: the motherboard power supply is not connected or damaged.

It depends on the memory problem. It is recommended to check whether the memory is tightly inserted or damaged.

AMI Bios beep code meaning 1 Short memory refresh failed.

2 short memory ECC check error

3 Short system basic memory (first 64KB) check failed.

4 Short system clock error

5 short CPU error

6 Short keyboard controller error

7 short system real mode error, can't switch to protection mode.

8 Short display memory error (display memory may be damaged)

9 short ROM BIOS checksum error

1 L3 short memory error (memory is damaged, please replace it)

1 L8 short display test error (loose display data cable or unstable graphics card)

The meaning of the alarm sound of the Award Bios (version number is different from the old one, and the meaning of the alarm sound is different).

No alarm sound: there may be something wrong with the power supply, motherboard or PC speaker. Check them for poor contact or replace the corresponding parts.

Short sound of 1: This sound is normal.

2 short tone: caused by CMOS setting error, reset CMOS, and generally call the default setting.

1 long, 1 short: memory and motherboard report errors, which are generally compatibility problems. Plug and unplug the memory again.

1 Long 2 Short: display error, which is generally due to poor contact between the graphics card and AGP slot, or incorrect connection of display data, or physical damage to the graphics card or video memory.

1 Length 3 Short: Keyboard controller reported an error. Try changing the keyboard first.

1 Length: the motherboard FlashRAM or EPROM is wrong (BIOS chip is damaged), try to replace it or refresh it again.

Long sound: The memory is damaged due to poor contact or poor insertion. Please re-insert or replace the memory.

Non-stop ringing: the power supply and monitor are not connected to the graphics card.

Repeating short sound: power supply

No sound and no display: power supply

High-frequency alarm during operation: the CPU is overheated, often because of overclocking. Please check whether the CPU fan is working properly.