Computer boot after the monitor does not light the system does not self-test what to do

The reason that the monitor does not light the system self-test after the computer is powered on.

(1) The button on the motherboard battery has no electricity or loose. Press the battery, if it does not start, without a BIOS warning sound, the ten may be the motherboard CMOS battery is dead, try the battery.

(2) All kinds of wiring or board card is not loose. Reseat the plug again and try again.

(3) A hardware failure. If there are no problems with the above two aspects, the hardware is usually out of fault. There is no alarm sound you did not say clearly. If there is alarm sound, can be based on the type of alarm sound to find out which hardware is the problem. Such a serious failure, the scope is generally in the power supply, motherboard, CPU, memory, graphics and other parts. For example: power supply is insufficient, voltage is not stable; CPU overheating, motherboard self-protection, motherboard power supply module problem; PCI slot failure, bad memory fault plugging, video card failure, etc. If there is a problem with a hardware, beginners do not dare to do, it is best to find experts or companies to help. If you have the conditions to check yourself, please note the following: First restore the CMOS defaults; do not try to get the optical drive, hard drive, network card, sound card, etc., use the minimum hardware method test, and then check the CPU, motherboard, memory, video card, monitor and power.