Computer boot monitor show no signal how to do?

Computer boot no display of the troubleshooting method (see if there is a drum capacitor).

The 1th step: first check the computer's external wiring is connected, the various lines plug again to see if the fault is excluded.

2nd step: If the fault is still, then open the mainframe box to see if there is any excess metal in the chassis, or the motherboard deformation caused by the short-circuit, smell the chassis has no burnt paste flavor, the motherboard has no burned chips, the CPU around the capacitor is damaged.

3rd step: If not, then clean the motherboard dust, and then check the computer is normal.

The 4th step: If the fault is still, then unplug the motherboard on the reset line and other switches, led lines, and then use a screwdriver short-circuit switch, see whether can boot.

5th: If you can not boot, and then use the minimum system method, the hard drive, floppy drive, optical drive data cable unplug, and then check whether the computer can boot, if the computer monitor appears on the screen, then the problem in these several devices. Then one by one the above several devices into the computer, when the access to a certain device, the failure to reproduce, indicating that the fault is caused by this equipment, and finally focus on the inspection of this equipment.

6th step: If the fault is still, the failure may be caused by memory, video card, CPU, motherboard and other devices. Then use the interpolation method, the Exchange method and other methods to check the memory, graphics, CPU and other devices are normal, if there are damaged equipment, replacement of damaged equipment.

7th step: If the memory, graphics, CPU and other devices are normal, and then the BIOS discharge, using isolation method, the motherboard is placed outside the chassis, the memory, graphics, CPU, etc. for testing, if the computer can be shown, and then the motherboard installed in the chassis test until the cause of the failure found. If the failure is still required to return to the manufacturer to repair the motherboard.

8th step: The computer boot without display but there is alarm sound, when the computer boot up, the system BIOS began to post (Power-on self-test), when the computer detected a fatal error in a device, then control the speaker issued a sound report error. Therefore, there may be no power on the display of alarm sound failure. For computer boot without the alarm sound failure can be based on the meaning of the BIOS alarm, to check the failure of the equipment to troubleshoot.

Unable to start operating system various diagnostic methods are as follows:

First check that the computer has started the operating system when it is powered on. If a panic, blue screen, or automatic reboot occurs when the operating system is started, the partition table for the hard disk and the master boot Record are normal, troubleshooting the hard disk partition table corruption, the hard drive master boot record, and the missing hard disk partition end sign. The following method is then used to diagnose.

1th Step: Start the computer in Safe mode first, to see if it can start, if it does not start, it may be infected, System file loss, operating system damage, hard drive, hardware device conflicts or hardware problems, go to step 4th; If you can start Safe mode, it may be that the hardware driver is incompatible with the system, The operating system is problematic or infected with the virus.

2nd step: Then run antivirus software, if there is a virus, it may be caused by virus, anti-virus after the restart of the computer, if not normal, you need to reinstall the operating system.

3rd Step: If the virus is not detected, you can use the operating system with the "System Restore" function, the System Restore, restore if the system is normal, the fault is caused by system damage. If the failure is still the case, the device driver may be incompatible with the system; then the sound card, video card, Nic and other devices to remove the driver, and then install the driver, each installation of a device to restart the computer to check which device driver caused by the fault, check out, Download the new driver for the faulty device and install it.

4th Step: If you cannot start from Safe mode, then reinstall the operating system with the installation CD. If you can install the operating system normally, go 7 steps, if the operating system failure, such as the crash, blue screen, reboot, etc. caused the system can not be installed, it should be a hardware problem or bad hardware contact caused.

The 5th step: Then clean the dust in the computer, cleaning memory, graphics and other equipment, such as gold fingers, reinstall memory and other equipment, and then reinstall the operating system, if the normal installation of systems, it is bad contact caused by the failure.

6th step: If you still cannot install the system, it may be a hardware problem caused by the failure. Then use the replacement method to check the hardware failure, after the replacement of hardware can be found.

7th step: If the operating system can be installed properly, and after installation failure disappears, it is the system file damage caused by the failure.

8th step: If the installation of the operating system, the failure is still, it may be the hard drive has bad road or device driver and system incompatible and so on. Use Safe mode to start the computer, if it can not start, it is hard drive has bad cause of the fault. Then use the NDD disk tool to repair the bad way.

9th step: If you can start Safe mode, the device driver is incompatible with the system. Then the sound card, video card, network card and other devices to remove, and then install the driver one after another, to install a start, to check which device driver caused by the fault. After checking out, download the new driver for the faulty device and install it.

Award's BIOS self-test bell and its significance

1 short: The system starts normally. This is what we hear every day, and it shows that there are no problems with the machine.

2 Short: General error, please go to CMOS setup and reset the incorrect option.

1 long 1 short: RAM or motherboard error. Try another memory, if not, have to replace the motherboard.

1 long 2 short: monitor or display card error.

1 Long 3 short: Keyboard controller error. Check the motherboard.

1 Long 9 short: motherboard Flash RAM or EPROM error, bios damage. Try the flash RAM for another piece.

Keep ringing (long sound): the memory strips are not plugged in or damaged. Reseat the memory bar, if still not, only replace

A single memory.

Keep ringing: power supply, monitor does not connect with the display card. Check all the plugs.

Repeat short sound: power problem.

No sound no display: power problem.