PC failures can cause a big problem for anybody depending on their PC for everyday jobs. Here explained some steps to reduce the reason why PC will not power up.

Instructions
Step 1
Initially you should do is to decide if power supply is defective or not. If PCs power supply fan from does not work when press switch, you may have a defective power supply or switch.

Step 2
You can check switch by jumping two wires for a half second to imitate the action of bush button. If PC turns on, then change the switch. If nothing occurs then detach any hardware from the power supply.

Step 3
After detaching all hardware attached to power supply, check and see if it will power up, if not change, if it does then turn off power supply and again attach the motherboard ; go to test again. If motherboard avoids operation of power supply then you have a problem with motherboard, processor or installed memory. You can try removing these and again powering to rule out various parts.

Step 4
General hardware failures can cause PC not to POST or “beep”. Many new motherboard manufactures will give warning of hardware failures through beep sequences. You must test motherboards manufactures manual to look out what codes mean. You must search internet or visit motherboards manufactures website to obtain the original manual in electronic form.

Step 5
If you do not know what particular brand of motherboard PC has, you can test motherboard for different numbers and words. Place those in to browser to perform a search for information. Instead, if you have a common name brand PC like a Dell or HP, you can generally find out this information rather easy with particular troubleshooting tips for PC.