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Need to know how old a computer it is as over the years the power supplies' use different methods of starting.
On newer computers the power supply is connected to the mother board by a 20 or 22 pin connector. The power button on the computer is just a momentary switch to start the computer. Make sure the large connector is firmly seated in the mother board. If you are comfortable with doing that have someone else check it. You do not want to damage the connector or mother board. You need to have some sort of anti static device conntected to your body to avoid any static discharge that could damage the mother board.
Hi, what you have not tested for isolation is your power supply, re-seating of processor for 20 minutes, cmos clearing or battery removal and mother board swapping. If all your isolation seems futile the worst is the mother board.
check your power connections, making sure it plugged into the wall not a power strip. try to start.
if no fans or lights come on at all most likely it is a power supply failure. if its a power supply , expect to pay between 40-90 dollars to have ti replaced.
use a paper clip to remove, usually there is a small hole under the drawer that you can stick it in. As for the power, is the light on the power supply or the mother board? If it is on the power supply there might be power going to the light but not the motherboard. I would test the power supply by buying a tester for like $20 or simply taking it in to a computer shop...
is there a post beep when the pc is switched on. check the memory if it is a beep beep beep sound , also disconect the hard drive, dvd drive, floppy, and any usb devices and see if it boots up. if that fails it does seem like the mother board, also check the cpu fan has it stoped. also find out the power switch conector on the mother board, from the base unit switch to the mother board. also chech the power connector from the power supply to the mother board , on newer boards there are two that go to the mother board its self , a big one and a very small one .
u did not said ur mother board vander name and chipset. because some mother board can not star if CMOS battery expire. remove CMOS battery check it voltage bellow 3V or not if it's voltage bellow 3V then replace it. and try to trun on ur shuttle.
remove ur power supply socket from the mother board short the pin green and black in the connector if the smps start no problen with the power supply then the problems lies with ur mother board wiring or fault in your mother board if your mother board has secondry power fix it correctly to mother board sock et with has 4 pin if its not working cousult a chiplel engineer the fault lies in the power supply of the motherboard
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