Solution 1 :

Check the power connections to the box, the monitor … and on the wall and on the motherboard. Are the lights on the monitor, the case is? If not, then you may have surfaced of a switch in your home or office. Try another electrical device or multimeter to check power … should slightly from 115 to 120 over 125 FRY a computer and other electrical equipment. When the lights are on, and power seems good, then you need to determine if the fan power supply from? Is the monitor on? Is the monitor’s video cable properly connected to the video card? Check the brightness and contrast. Connect the monitor to another computer, if possible, verify the monitor is not the problem.

Solution 2 :

Are the lights in drive – floppy or CD-ROM? Is while the flash power? If so, then probably not the drive or cabling … if they stay on, there is a particular problem. Check the BIOS settings. Maybe the battery is empty or too low. If the BIOS is correct, the position of the cable and check all connections and jumpers. Make sure you do not miss one of the pins when installed. In addition, ensure that the power connector on the right “to remember, red to power” in most units.
Solution 3: If the monitor is working well, and all the other stuff checks out, it is likely that – just plugged into the motherboard, bad power supply or PC speakers wrong. If the PC speaker is wrong, you do not hear the beep codes.
Solution 4: Verify that all expansion cards are fully inserted into the slots. A card inserted in part, the system can not boot cause – fan power can, but the screen is black) (empty, without any message. If all cards and cables are correct and the system still does not work …

Solution 5 :

Try and unplug everything except the motherboard, disconnect the PC speakers and video card … when the power here, then check the RAM, video card, motherboard and power supply.

Solution 6 :

Use a different source – this is a very common problem. Power supplies today are designed to protect their lives (save) for the rest of his team to give. Moreover, most of the new power supply, which are sold today, we have tested it does not give us the basic tests, and they use many shortcuts to reduce the cost.

Substitute Resolution 7 :

move the system RAM or other slots in it.

Solution 8 :

If all else fails, replace the motherboard itself. This is a very rare but it does not happen percent closer together.

Resolution 9 :

Use a different CPU – very rarely … In 20 years I have only twice in a system that works before been seen.