|
|
|
Start new subject | Reply to this subject
|
[1] 2 
|
 bennyrub |
Sat, 07/11/09@14:51
|
|
hi guys
I recently bought a new chassis and decided to swap my pc to work in that. I have screwed in the mobo, screwed in the psu, plugged the psu into the ATX power connector on the mobo.
When i plug in the psu to the mains and then turn it on, once ive pressed the case power on button at the front of my case it seems that my fan starts to spin for a fraction of a second and then there is no power and nothing happens.
My motherboard is the Asus P5N73 AM here is a link to the manual click here
my new psu which i bought is here click here
Please help!
|
bennyrub |
Sat, 07/11/09@15:20
|
|
Anybody please give me a hand? Im worried ive fried something and ill need to fork out more cash which i dont have! ;(
|
RobTheOrganGuru |
Sat, 07/11/09@15:24
|
|
Something up with PSU I think thats not a good powersupply you have by the way.
|
Crossbow7 |
Sat, 07/11/09@15:28
|
|
It's easy enough to forget to plug in the 12V 4pin connector (number 11 of page 34 in the PDF manual). Did you do this? If yes, then see the rest of this post...
Sometimes when it switches on for a fraction of a second, it could be due to a faulty case switch.
For troubleshooting purposes only, temporarily disconnect the wire that connects the front case switch's to the motherboard power header.
Then, with the help of a flat head screwdriver, (& the PSU plugged into the mains) short the power header pins for a second, i.e. until it switches on.
If it starts up normally & continues to do so, the case's switch is not working properly.
If symptoms remain the same, then at least you know the case switch is not the cause & we can try something else. G
|
Crossbow7 |
Sat, 07/11/09@15:29
|
|
"...thats not a good powersupply you have by the way." - on the contrary, that's a very good PSU. Antec make excellent PSUs - some don't possess the best external looks though. G
|
Fruit Bat /\0/\ |
Sat, 07/11/09@15:31
|
|
Check all connections (4 pin next to CPU connected?)
|
Fruit Bat /\0/\ |
Sat, 07/11/09@15:32
|
|
Check all connections (4 pin next to CPU connected?)
Crossbow
must refresh before posting :0)
|
bennyrub |
Sat, 07/11/09@15:40
|
|
Okiedoke, i had already plugged in the 12v 4 pin connector.
I also tried shorting the pins of the power btn but nothing happened once again.
I am right in thinking that the power btn pins are page 35 diagram 12 of the manual. Both my power btn wire from the front case and the reset do not have a + or - on the two wires. Will thi affect anything?
Sorry for the hassle, im just worried ive botched it up.
|
Crossbow7 |
Sat, 07/11/09@15:46
|
|
The Power button does have polarity, but not termed as +ve & -ve.
But for the sake of the cases' connectors, you can take Power (PWR) to be +ve & Ground (GND) to be -ve. See top right of diagram on pg 35. G
|
bennyrub |
Sat, 07/11/09@15:46
|
|
oh and i forgot to mention, when the psu is plugged in and turned on a small led is lit on my motherboard. Not sure if this can help you guys determine anything.
|
Crossbow7 |
Sat, 07/11/09@15:51
|
|
The LED lighting up, & staying lit, is a good sign. A blinking LED is not a good sign.
Anyway, try matching the case switch's 'polarity' to the power header's on the motherboard (see my previous post).
|
bennyrub |
Sat, 07/11/09@15:54
|
|
Tested again by shorting the power button and then plugging it back in to try again with the switch and nothing.
The mobo was working fine last night as i was on my computer. I dont think its the PSU, although i have two spare psus i could check with.
What is the bare minimum amount of components i could test with?
Should i start by just running the mobo, psu and cpu and then short the power headers to get it to start?
|
Crossbow7 |
Sat, 07/11/09@16:00
|
|
Do the wires emanating from the front of the case for the Power & Reset buttons have any polarity marked on them?
The Red wire is usually +ve & will plug into the PWR header (pg 35 diagram), & the other one goes into GND.
And note that the Reset header's polarity is 'reversed' (compared to the Power). Is the Reset header being connected correctly as well? G
|
bennyrub |
Sat, 07/11/09@16:16
|
|
The wires arent marker as to which polarity is which wire but i have tried them both ways around and still nothing.
Ive recorded a short video to show what happens when i press the power button ill upload it to youtube now.
Any more ideas what could be the problem?
|
bennyrub |
Sat, 07/11/09@16:34
|
|
click here is the video. As you can see the fan moves slghtly then nothing happens
|
bennyrub |
Sat, 07/11/09@17:04
|
|
Im going to set up a little bench test which i know i should have done before i set up my components in my case.
Just wondering, on my graphc card i have a gnd wie running off it. Looking at the manual does anyone have any ideas where i plug this? I cannot find any labels on the mobo mathing to these.
|
bennyrub |
Sat, 07/11/09@17:16
|
|
Reight, good news people! Set up the PSU, motherboard and cpu and the motherboard poweres up normally, both fans spin like normal so im guessing the motherboard was short circuited on the case?
The little brass standoffs which were used in my old case to keep my motherboard lifted abit are not the correct size in my current new case and so they screwed in slightly lop sided. Will these be causing the shorting?
|
Crossbow7 |
Sat, 07/11/09@17:21
|
|
What's the graphics card model? Does it need external power from the PSU?
Does shorting the power header pins elicit any response at all?
Have you tried a CMOS reset? See pg 27 of the manual. Also try removing the battery, as it says lower down. G
|
Crossbow7 |
Sat, 07/11/09@17:24
|
|
Oops, posted without refreshing!
That's good news :-).
"Set up the PSU, motherboard and cpu..." - with or without the graphics card? G
|
Fruit Bat /\0/\ |
Sat, 07/11/09@17:25
|
|
Will these be causing the shorting?
most likely
you should have some new ones come with the motherboard pack.
|
|
[1] 2
|
|
Total threads 325772 | Total posts 2112102 | Total users 293199
|
|
Forums > Helproom
|
Back to top
|
