I am building a computer and have everything in brand new power supply and when I go to turn it on nothing happens. The fan doesn't even run on the power supply. Jumper configurations are all correct. Any advice?
An expert who has achieved level 2 by getting 100 points
An expert who has answered 20 questions.
An expert that has over 10 points.
An expert whose answer got voted for 2 times.
Re: AB9 Pro motherboard
Do this test this will tell you if your power supply is good or bad we will do the process of elimination ok. How do I test if the power supply is bad? Warning This test is for those with extensive electronics training. Do not try this if you do not have extensive electronics training. Make sure there is enough load connected to the power supply before testing ( at least motherboard and one hard drive)!
ATX power connector layout isshown above. 5VSB constantly provides 5V power to the connector through pin 9. If you have a voltmeter, while the power supply fan does not turn on, you could identify which pin is pin 9. Normally there is a clip on the connector between pin 15 and 16. If one can identify pin 14 (the only green wire goes to pin 14), this is the power-on pin. Onee can use a piece of wire to short pin 14 and 15 (or any other black wired ground pin). If you power supply has power connected to it and power switch on the power supply is on, the fan should be turning by now. Otherwise, your power supply may have problem.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
You replaced power supply and your made sure you plugged everything back into the motherboard snuggly and in it's proper place? If so it might be your motherboard is bad.
Make sure you have the new power supply turned on. Sometimes there's a O/I switch on the back of the power supply. Flip it and try to boot and see what happens. You might have another bad power supply. If so your motherboard might be burning them out.
Try removing the power cord for 30 seconds and press and hold the power button. After 30 seconds put the power cord back in and press the power button to see what happens.
Do your fans work when you press the power button? Do you hear any fans running?
1. Could be as simple as not having the Power Switch on the right jumper...double check.
2. The board will power up with nothing hooked to it... just power, CPU, MEM... disconect everything to just to get the board up to the bios.
3. Make sure PS is securly connected to the MB.
4. Check Jumper on the Board to make sure the Test Jumpers are not set
5. Memory is seated correctly... if you pull them out the board will start and beep...
1. Make sure you have all of the power connectors connected. There may be an additional 4-pin P4 connector and another on your video card.
2. Make sure CPU, RAM and cards are all well seated.
3. Frequently failing power supplies deliver less power before they die completely. It may just have enough power to spin the fan. Try another power supply. They are cheaper than a new MB and you can return it if it doesn't fix the problem.
1. Processor is cold dead.
2. Power Supply has got a problem. Just powering a fan is not a guarantee that it is powering everything normaly. Try a different one as you test agai.
3. I suspect your MoBo is good, but try a different video card also with your new DDR.
4. Do you hear the HDD cranking or whining when you turn on the PC? Keep ear near HDD and listen. It it whine-starts, it's a fair sign.
5. Try a different monitor while you test these.
The ATX power supply needs to have pin16(PS_On#) to be connected to COM for it to work.
When you press the power switch on the front panel of the computer, you are essentially making this connection.
Check that the cable from the power supply to the motherboard is making good connection.
You can verify operation of the power supply by shorting Pin16 to pin17 on the powersupply output, with a paper clip. Pin16 is usually a green wire and 17 is black.
Hope this helps.