MOTHERBOARD NOT POWERING UP

Hello All,

I have a ASUS P4B motherboard and the switch stopped working to turn on the pc, I have checked all the connections/jumper setting and they seem to be fine, everything was working fine. The green light is lit on the motherboard so the motherboard is getting power, not sure what I should check to figure out if I need a new power supply or motherboard or what?? Would the jumper cable be bad, not sure I have ever heard of that?  I believe the pc was shut down but then would not power back on again, there wasn't any power surges or anything like that.

Thanks in advanced for the help.
Newbie0000Asked:
Who is Participating?
 
nobusConnect With a Mentor Commented:
i would test with another power supply first - it is the prime suspect.
You can also test this one on another PC
and check here how much power you need :  http://extreme.outervision.com/psucalculator.jsp      
here some good info about power supplies : http://www.smps.us/computer-power-supply.html
0
 
lcitCommented:
Disconnect all the cables except for the power supply.  Use a small screwdriver or other metal object and short the pins on the motherboard where the lead to your power switch connects.  Let us know what happens.
0
 
Newbie0000Author Commented:
I left the power cable plugged in and disconnected the jumper for the power switch on the motherboard and put the screwdriver on that pin but nothing happened?
0
Take Control of Web Hosting For Your Clients

As a web developer or IT admin, successfully managing multiple client accounts can be challenging. In this webinar we will look at the tools provided by Media Temple and Plesk to make managing your clients’ hosting easier.

 
Robert Sutton JrSenior Network ManagerCommented:
It should be 2 pins that you should be shorting between on the motherboard. The ATX-SW or whatever its labeled is a (2) pin configuration. You should be attempting to short between those 2 pins.
0
 
lcitCommented:
You have to short the two pins together for a second. You're just making the same connection the switch would when you press it.  Do you have a volt meter to make sure your power supply is working correctly?  Have you taken out all the expansion cards?
0
 
johnb6767Commented:
If the PS is working properly, visually check the board for any bad capacitors for bulges, and leaks (looks like brownish dust on the outside of them.. (like a terminal on a car battery).

http://www.badcaps.net

for examples....
0
 
Newbie0000Author Commented:
All the cards are out, I have tried to short the two pins again with no luck, I held a screwdrivers against the two pins for about 20 seconds and nothing, The board looks fine. I have a digital multimeter but have never used it, can I check the ps with that?
0
 
lcitCommented:
Yep.  You'll be looking for 12 and 5 VDC.  Here's a link with some tips.

http://www.bluemax.net/techtips/ATXPowerSupplyWiring/ATXPowerSupplyWiring.htm
0
 
Newbie0000Author Commented:
Hey All, thanks for all the help, it is greately appreciated. The problem was the power supply, all is up and running now. Again, thanks for the help.

Cheers,
0
All Courses

From novice to tech pro — start learning today.