What should I do if the computer can t turn on the machine and there is no signal, and the computer

1.Boot press F8 to immobilize to the advanced option appears in the let go, select "the most recent correct configuration" Enter to repair.

2. Press F8 to enter the safe mode after booting up, and then exit, select Restart or Shut Down to boot on, and you can enter the normal mode (repair the registry).

3. If the fault persists, please use the system restore that comes with the system to restore it to the time when you did not have this failure (or use the restoration software to restore the system).

4. If the fault persists, use the system disk to repair it, open the command prompt and enter sfc scannow Enter (there is a space between sfc and ), insert the original system disk to repair the system, and the system will automatically compare and repair.

5. If the fault persists, set the optical drive in the BIOS as the first boot device, insert the original system installation disk, press the R button, and select "Repair Installation".

6. If the fault persists, it is recommended to reinstall the operating system. You can try the U Guard (uweishicom) U disk installation system, which is easy to use, free and clean.

7. I hope it will help you. Hope.

Check that the individual plugs are plugged in.

Is it not connected to the wireless, if the notebook has a wireless network card turned off, HP is F12 to turn on and off the wireless network. You see if yours is not.

Check that the plug of the monitor is plugged in.

The computer has no signal, can not turn on, first check the hardware problem, see if the power supply is connected normally, and then check whether the power button of the host is normal, if the power supply of the mobile phone is normal, check whether there is a problem with the motherboard, the power supply inside the motherboard is recommended to be plugged in and unplugged again, if it is not easy to re-plug and unplug, we recommend checking whether there is a problem with the motherboard, it is likely that there is a problem with the power supply part of the motherboard.

The computer has no signal and can't turn on, it is likely that the power cord is not plugged in, you should first check whether the power cord is plugged in, whether the power switch is turned on, whether the socket has electricity, if these are normal, you need to go to the computer brand after-sales service point to check and repair.

There is no signal on the computer boot display, usually from the following aspects, first you have to check whether the connection cable of the display can be used normally, second, you need to see if the computer is in the boot state, whether there is a prompt sound or whether the indicator light is displayed normally, and thirdly, we still have to check the graphics card memory CPU power supply.

.Check whether the computer parts are plugged in securely, check whether the monitor cable is plugged into the host interface, and then check whether the graphics card is plugged into the motherboard.

2.Confirm if the monitor is damaged if the monitor and graphics card are mounted.

3.Confirm if there is a problem with the fan and if the monitor is not damaged, check.

Step 1: Check whether the data connection cable is loose or damaged, tighten it if it is loose, if not, then find a new data connection cable for testing; Step 2: If the monitor shows no signal, it will be black and open the screen for a while, repair it from the graphics card, memory module, and motherboard, disassemble the host to find the graphics card and memory module and pull it out, clean the card slot, wipe the gold finger with an eraser, and then insert it again; Step 3: If you still can't solve the problem, find the battery and remove it, leave it in the laughing hole for a few minutes, and then reinstall it; Step 4, still can't solve, just unplug the host power cord, press and hold the host switch button, plug in the power cluster like a key to turn on, if it can't be solved, you may need to change a new monitor.

There is no signal when the computer is turned on, there must be a problem with the computer hardware, and it is best to use the replacement method to eliminate the problem, and the judgment method:

1. Press the upper and lower case on the keyboard. The light is on, indicating that the graphics card, monitor, and other hardware are faulty.

2. If the keyboard light does not light up, it means that it is a memory, CPU, motherboard, or power supply problem.

Solution: 1. If the keyboard light does not light up, first wipe the memory module with an eraser, and check whether the gold finger of the memory module has any burnt marks. Replace the memory in the slot.

2. Check the capacitors and resistors on the motherboard to see if the capacitors are bulging, whether there is a burning smell on the motherboard, and clean up the dust on the motherboard.

3. Remove the CPU fan, power on and turn on, test whether the CPU has a temperature change by hand, if not, the CPU is not working, either the motherboard is broken, or the CPU is not plugged in properly, and the CPU is re-plugged.

4. Power supply problem, although the power supply is powered on, but the motherboard can not work normally, replace the power supply and try it.