When i switch on my system for first time the system is not switching on then.. i mean when i switch power button on my cabinet the cpu fan and power is getting on but the display is not coming then i switch off the cpu and immediately iam switching on the cpu then for second time the system is working normally.. once i shut down the cpu and then if i start the cpu again same problem my system is not getting started again i have to switch off the cpu and then i have to switch on the system it is irritating me alot so please help me out some one thanks in advance.......
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open the tower/ ATX cabinet and then check the two small power cable pins that connects the power button on the ATX cabinet and the motherboard, remove the same from the motherboards end (make sure you note down from where you removed the 2 power pins and then using a insulated screwdriver short the power pins on the motherboard for a second until you see the power coming on let go of the pins as soon as you see the CPU fan moving if it stays on and works normally it is a faulty power switch on the ATX cabinet and then you can either replace only the power switch or get a new ATX cabinet to fix it
you can also check if motherboard stays on if you remove the RAM chip from the motherboard. if yes its a faulty Ram and replacing the same should do the trick
you can also try cleaning the dust accumalated under the CPU fan and between the heat sink as some motherboard cuts off the power depending on the temperature
also if nothing works you can try using a different power supply unit to see if that's the case,
if still no luck then its time to buy a new motherboard.
Check your computer is getting power, (reconnect power from outlet)
if power is ok, then open your computer cabinet, disconnect motherboard power (24 pin), then make short Green and Black wires and check power supply fan is working or not, (Switch off computer when disconnecting)
if fan is not working replace power supply (SMPS) and check (working fan means SMPS is ok, but in some occasions Fan may work in defective SMPS )
if the power section is ok you need check you mother board
This is was with me too. I know how to fix it. Remove all cables from your cabinet, i mean like keyboard, mouse, moniter etc. Remove your ram too. Then press your power button from 30 seconds. wait for 10 mins plugin all cables and turn it on. Hope it works for you.
You need to reset bios. Open cpu cabinet and pull cmos cell from motherbord chipset for 15 minutes then all settings are factory defaults. Aslo you can reset settings with jumper settings . Refix your RAM memory. Refix processor. Reattch ATX power supply to motherbord. Thanks for using fixya. Please rate solution if it helps.
have a look at the top back side of the CPU , near the smps fan where power cable is inserted. here u can find a small square cutting with a slider inside. On careful look you will find 110V and 220V inscribed on it on either end. Only one marking is visible at a time. Select by sliding this switch.
Note: Many systems do not have this facility. In that case you have to replace the power supply(SMPS) inside the cabinet.