If it can t be turned on, what can I do?

Computer start-up alarm sound.

award bios

1 Short: The system starts normally. Shows that there is nothing wrong with the machine.

2 Short: General error, please go to CMOS Setup and reset the incorrect options.

1 long and 1 short: There is an error in the memory or motherboard. Try to change the memory, if it still doesn't work, you have to change the motherboard.

1 long and 2 short: The display or graphics card is wrong.

1 long and 3 short: The keyboard controller is wrong. Check the motherboard.

1 Long 9 Short: Motherboard Flash RAM or EPROM error, BIOS corruption. Try a different block of flash ram.

Constant ringing (long sound): The memory module is not plugged in tightly or is damaged. Reinsert the memory module, or replace the memory.

ami bios

1 Short: The memory refresh failed. Replace the memory module.

2 Short: The memory ECC verification error is incorrect. In CMOS Setup, you can solve the problem by setting the memory option for ECC check to disabled, but the most fundamental solution is to replace it.

Memory. 3 Short: The basic memory check of the system fails. Change memory.

4 Short: The system clock is wrong.

5 Short: There is an error in the CPU.

6 Short: Keyboard controller error.

7 short: The real mode of the system is wrong and cannot be switched to protection mode.

8 Short: A memory error is displayed. If there is a problem with the display memory, try changing the graphics card.

9 Short: BIOS chip check and error.

1 long and 3 short: memory error. If the memory is damaged, it can be replaced.

1 long and 8 short: A test error is displayed. The monitor cable is not plugged in properly or the graphics card is not plugged in properly.

Tell us the details. Now all you can tell is that the power is not plugged in.

See if the power supply is broken, or if it's not connected? Check the hardware first, and then check the system problem, which is generally more hardware

Dude, what's your situation, let's be clear.

The causes of the black screen of the computer and the solutions are as follows:

One: Monitor.

The black screen caused by the failure to work normally due to the display itself, such as the power cord of the monitor is faulty, the power plug is in poor contact (note: both ends are possible), the power switch is broken, and the internal circuit of the monitor is faulty, and the monitor can be repaired.

Two: signal line.

For this case, the main check whether the D-shaped plug of the display signal cable has broken pins, crooked needles or short pins, and then there are broken wires inside the signal cable. The solution is to replace a good quality signal cable.

Three: Graphics card. The most directly related to the display is the graphics card, if the graphics card has no signal sent or there is a signal that cannot be sent, then the display will of course not light up.

In actual use, the graphics card is incompatible with the motherboard, the signal output socket of the graphics card is not in good contact or loose, and then the graphics card is damaged, and the graphics card is not in good contact with the AGP slot of the motherboard, which will cause the display sensitive commesis to not light up. For the elimination of such faults, you need to be careful and patient, carefully check the contact between the graphics card and the motherboard, and whether there is any unstable contact. Incompatible conditions can only be judged based on experience and data.

Hardware failures can only be replaced or sent for repair.

Four: power supply. The power supply is the power source of all parts of the computer, if it has a problem, the other parts will not work normally, if the power supply is faulty, the host will have a continuous short "tick" sound alarm, and the display is not lit. It is recommended to replace the power supply.

Five: Motherboard. The main reason is that the CMOS setting is wrong, and the first initialized graphics card is set to PCI or the onboard AGP graphics card, but the monitor is not connected to the corresponding position, and the computer starts normally, but the monitor does not light up.

In addition, the problem of CPU, memory or graphics card, sound card, modem, and network card conflicting will also cause the host to not boot and cause the display to be black.

6. Software Conflicts.

The most typical feature of this type of fault is that after installing a certain software, the system prompts a restart, and after the self-test screen, only the cursor is flashing on the display, and then there is no movement. The solution to this kind of problem is also very simple, just remember what software was installed just now, press and hold the "Ctrl" key when starting, select item 3 to enter safe mode, and uninstall the software just installed.

Seven: Virus destruction.

Viruses are extremely destructive, especially with the advent of the Internet age, more and more viruses are spreading through the Internet. Viruses that can cause a black screen on the display, such as CIH, are extremely destructive, and directly rewrite the BIOS chip of the motherboard, causing the machine to not start at all and not self-test.

If you don't have tools like the Chipwood Programmer, your motherboard will have to be scrapped. Sometimes it may be because the BIOS chip is broken by a virus, which causes the maintenance personnel to misjudge and delay a lot of time. Solve it with antivirus.

First, the hardware is not plugged in.

2. The fan or system is damaged.

What can't turn on, computer, camera, phone?