The reason why the computer can't boot and how to solve the computer can not open the machine

　　 1. How to solve the computer boot without power

A newly installed computer, press the power button, the display does not show that the power LED is not lit, the computer can not start.

Check this type of failure should first check the connection problem, and then check the accessories good or bad, the specific steps are as follows:

First look at the monitor power led, found that the indicator light constantly flashing, indicating that the monitor power connection is normal, and then replace the host power cord, the fault is still, the problem is not the power cord.

Unplug the host power cable, then open the host chassis, unplug the ATX power plug, reinsert the motherboard power outlet, and then boot the test, the failure remains.

Check the chassis power switch line and find that the switch line is connected to the motherboard pw-on pin, completely correct, as shown.

This is suspected to be a power supply failure, with a good power supply replaced the original power, and then the power-on test, the monitor appeared on the screen, the confirmation is a power failure.

After replacing an ATX power supply, install the operating system, and use test software to test the machine, all normal, troubleshooting.

Power

This type of failure occurs most of the old computer because the ATX power supply is damaged, or the motherboard is damaged, or the chassis power switch line problem. Most of the new computer is due to the plug is not plugged or the switch line plug in the wrong location, but also may encounter ATX power damage or motherboard damage.

　　2. The computer boot after no display, but the host power led long light how to do?

Phenomenon: A computer boot after the screen does not respond, the host power led long light, can not start.

Solution: Check this type of failure should first check the monitor signal cable connection problem, in the inspection of accessories, the specific operation is as follows:

(1) First check whether the monitor signal is in good contact.

(2) If there is no problem, unplug the host power cord, and then open the chassis, check the memory, video card and so on whether contact bad.

(3) If the memory, graphics and other installed firmly, then use the replacement method to check the memory, and then the power-on detection, found that the failure disappeared, which can be judged to be the original memory problems. Replace a new memory for troubleshooting.

The new computer generally easy to appear accessories are not installed or incompatible fault, if there are conditions, in the event of problems, it is best to use the replacement method for inspection.