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Windows 7: PC powered off and wont power on?

18 Sep 2011   #1
moonbeep

Windows 7 Professional x64 SP1
 
 
PC powered off and wont power on?

Was browsing a website when my pc just powered off,tried to turn it on but the blue light flicks for a sec and it wont turn on,i have a usb ext hdd plugged in and the light on it is green,so think this rules the motherboard out,also take 1 stick of ram at a time out and tried to power up,still no power,took sound card out,still no power,im thinking psu,but why would the usb lightup the ext hdd,anybody any ideas before i take it too the pc shop in the morning,they fitted a motherboard for me 3 months ago,so if its the motherboard it should still be under warranty~?

Many Thanks


My System SpecsSystem Spec
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18 Sep 2011   #2
essenbe
Microsoft MVP

Windows 7 Enterprise X64/Windows 10 X64
 
 

Try disconnecting everything non essential 1 at a time. If you disconnect 1 thing and the computer comes on, you'll know what is caysing problems. Just because a light lights up or a fan spins only means the PSU is putting out some power. It does not mean that it is putting out enough power to run a computer. If you have access to another known good power supply, try connecting that and see if it comes on. If needed, see if you have afriend that will loan you one to test with. The PSU you have is one of the better PSU's you can buy. They rarely give you problems. Try those things and let us know the outcome.
My System SpecsSystem Spec
19 Sep 2011   #3
karlsnooks

MS Windows 7 Ultimate SP1 64-bit
 
 

Disconnect everything other than keyboard and monitor and ram and your harddrive.

Take the cover off.

Does the computer power up?

Are the fans turning?

Hear any beeps from the motherboard?

Any loose connections?
My System SpecsSystem Spec
.


19 Sep 2011   #4
moonbeep

Windows 7 Professional x64 SP1
 
 

Quote   Quote: Originally Posted by karlsnooks View Post
Disconnect everything other than keyboard and monitor and ram and your harddrive.

Take the cover off.

Does the computer power up?

Are the fans turning?

Hear any beeps from the motherboard?

Any loose connections?
Not confident about doing that,last time i tried too install a hd6870 with 2 connectors i fried the mobo,so left it into shop that fitted the new mobo 3 months ago,so if its the mobo they will replace it,if not will get it fixed by end of week hopefully,will let yous know the outcome and what the problem was.
My System SpecsSystem Spec
24 Sep 2011   #5
moonbeep

Windows 7 Professional x64 SP1
 
 

Quote   Quote: Originally Posted by moonbeep View Post
Quote   Quote: Originally Posted by karlsnooks View Post
Disconnect everything other than keyboard and monitor and ram and your harddrive.

Take the cover off.

Does the computer power up?

Are the fans turning?

Hear any beeps from the motherboard?

Any loose connections?
Not confident about doing that,last time i tried too install a hd6870 with 2 connectors i fried the mobo,so left it into shop that fitted the new mobo 3 months ago,so if its the mobo they will replace it,if not will get it fixed by end of week hopefully,will let yous know the outcome and what the problem was.
Got a call today,seems its the motherboard at fault,so shop will replace as its only 3 months old,was my first Gigabyte motherboard too,was only meant as a replacement to I upgraded,have the money next week to do that,but her indoors isnt too keen on me spending 350 to upgrade!
My System SpecsSystem Spec
Reply

 PC powered off and wont power on?




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