Double defective power supplies?!? - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > Hardware Repairs and Troubleshooting
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 12-28-2009, 10:40 AM   #1 (permalink)
Junior Techie
 
JamesMW's Avatar
 
Join Date: May 2009
Location: Alpha Centauri
Posts: 60
Default Double defective power supplies?!?

I just put together a comp and I can't get it to power on. Nothing, no fans, no hd, nothing. I double checked the connections and swapped the psu for another one I had laying around. Still nothing. The case fans draw power directly from the psu so I assume its not motherboard related. However, I have a hard time believing I have TWO defective power supplies. Are there any other possibilities on what could be causing the problem? I really appreciate any help.

Here are the two power supplies I tried.
Newegg.com - CORSAIR CMPSU-400CX 400W ATX12V V2.2 80 PLUS Certified Compatible with Core i7 Power Supply - Power Supplies

Newegg.com - Antec Basiq BP430 430W Continuous Power ATX12V Version 2.2 Active PFC Power Supply - Power Supplies

Heres my mobo too, for what it's worth

Newegg.com - GIGABYTE GA-MA785GM-US2H AM3/AM2+/AM2 AMD 785G HDMI Micro ATX AMD Motherboard - AMD Motherboards

Thanks

ps
I checked the power outlets too
__________________

__________________
i7 920 @ 3.3Ghz ASUS P6T
GTX 285 WDCB 640GB
OCZ GOLD 6GB Thermalright 120 thingy

GOT URANIUM?
if you don't, click here http://www.unitednuclear.com/uranium.htm

Never trust a computer you can't throw out a window - Steve Wozniak
JamesMW is offline  
Old 12-28-2009, 12:17 PM   #2 (permalink)
Super Techie
 
Join Date: Dec 2005
Location: Massachusetts
Posts: 458
Default Re: Double defective power supplies?!?

Quote:
Originally Posted by JamesMW View Post
The case fans draw power directly from the psu so I assume its not motherboard related.
The psu gets told to turn on from the mobo, so if the mobo doesnt work, the psu wont be turned on and the fans will never get power.

To test your powersupply, unplug it from all your computer components.
Switch the back of the power supply off, you may also unplug it from the wall at this point.
Take a paper clip, and put it in the pin with the green wire, and the other end into any pin with a black wire. See ATX power supply connector pinout and wiring @ pinouts.ru
Now plug back in the power supply, and switch the back of the power supply on. The fan of the psu should start to spin.
This will tell you if the psu is completely dead or not.
Be sure to turn off the powersupply before removing the paper clip.
__________________

__________________
Intel E8400
Zalman 9500AT
evga 8800gt dual-slot cooler
4gig (2x2gb)g.skill ddr2 1066
gigabyte p43-ds3L
Antec sonata II mid tower
200gb Seagate HDD, 500gb Seagate HDD, 1TB Seagate HDD
bkolk is offline  
Old 12-28-2009, 12:26 PM   #3 (permalink)
Seg Fault'n
 
Join Date: Jul 2005
Location: The dried husk where America came from
Posts: 5,801
Default Re: Double defective power supplies?!?

Also remember to attach something (like a fan) to the PSU when testing it because ATX PSUs are not designed to be run with no load.
__________________


There are in order of increasing severity: lies, darn lies, statistics, and computer benchmarks. - diskinfo man page
"Get your money and let's go to court!" - Craig Mudie, MS
kmote is offline  
Old 12-28-2009, 01:00 PM   #4 (permalink)
Lord Techie
 
Hefemeister's Avatar
 
Join Date: Feb 2004
Location: Sweden
Posts: 9,093
Default Re: Double defective power supplies?!?

Also you can try the screwdriver on the power switch front panel pins in case your button is defective.
__________________
ASUS P6T Deluxe V2 :: INTEL i7 920 @3.4 :: XFX GTX260 :: 6gb Corsair 1600 :: Corsair 750TX :: TRUE 120 :: Samsung T240 24" :: Windows 7 X64

I do not accept support questions via PM

"Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety."
Hefemeister is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
*READ FIRST* Updated Power supply guide Ste New Systems | Building and Buying 37 04-11-2012 03:50 AM
computer hangs on a black screen zenyora Hardware Repairs and Troubleshooting 15 06-10-2009 03:12 PM
What To Look For When Buying Computer Components Luke Monitors, Printers and Peripherals 25 01-07-2009 09:09 PM
An Extensive Guide: Maximizing Performance, Minimizing Budget Sora New Systems | Building and Buying 42 08-23-2008 06:35 PM
is 400W enough for a 8600GT Card Iokewe New Systems | Building and Buying 25 12-26-2007 08:47 PM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:53 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.