New ASUS A7V133 has no power

[dbl_0527]

I just got my new A7V133. I put in RAM, processor, hooked up HD, floppy and CDROM, video card, power connector, and hooked up all panel connectors. On my power supply I flip it to the "ON" position (the standby power light comes on), and when I press the power button on case......NOTHING.

So I reverse "POWERSW" 2-pin connector and try again.....NOTHING.

So I unplug the other panel connectors and just try the "POWERSW" connector (both ways) and still nothing. ATX power connector is secure.

WHAT'S THE DEAL! It's right out of the box.

[Bovon]

A couple of things come to mind. 1) an ATX psu has two power supplies in it. One is a 5 volt supply that run all of the time the computer is plugged into a wall socket. 2) the switch on your case/tower is bad. Take a small screwdriver and short the two pins where the case switch plugs in, just for a few seconds. The switch is just a momentary switch, not an off / on type,...kinda like a car horn button...the horn only blows so long as you press the button.

The 5 volts in the psu may not be good...and if the mainboard does not get this 5 volts applied, it will never turn on.

Try these things, and let us know what happens...

[dbl_0527]

When you say "take a small screwdriver and short the two pins where the power switch goes in", do you mean touch the two pins with the head of the screwdriver so that the end of the screwdriver is touching both at the same time? If you do, I did that and nothing happened. Also, I took a Pentium board (810 chipset) out of the case just moments before I put this new board in and it was working fine. In light of this, could the 5 volts in the psu still be bad? Does the pentium board not need those 5 volts? Any more suggestions?

By the way, it is a 300W psu.

[dbl_0527]

Update:
On the back of the power supply, there is a switch for 115V and 230V. It was on 115 so I switched it to 230. I didn't cut the power on b/c I didn't know what would happen. I flipped it back and forth a couple of times and finally left it on 115V. Then I flipped the switch on the psu on and pressed the power button on the case and VOILA fans started whirring. The powersw was the only connector i had plugged in. I never got a display or any beeps (the speaker wasn't plugged up). AFter about 30 seconds the system just shut off. I pressed the power button on the case again and the fans starte whirring, but still no display. I plugged the speaker cable in and all the other connectors to see if I could hear any error beeps. When I pressed the power button on the case again......NOTHING. I switched the psu off and toggled the 115/230 switch and left in on 115V and tried again and still nothing. What gives?

[bobyt1]

try unpluging every thing. except the case connections and the fans. take out all the added boards,including the video card. then turn on the power. press the power on sw. if the fans start listen for beeps. if the system starts then start adding componets 1 at a time, restarting after each 1, this will tell you which device is giving you problems.

[dbl_0527]

After a few minutes, I can power it up again. Is this an overheating problem? There is a chance that the processor (Duron 650) may be bad, but that shouldn't have anything to do with me just trying to get into the bios, should it? The processor didn't have a HSF with it so I put one on that come on a factory Celeron 733, thinking it should keep it cool enough to at least get into BIOS. Is this my problem? I put my hand down where the HSF meets the processor and it's warm (it's only been all of maybe 1 minute total). Maybe I should just wait until I get a proper HSF and thermal paste. Any suggestions? Thanks for all the feedback

[Bovon]

Sorry I couldn't get back. My ISP closed up shop and left a lot of customers hanging out to dry.

Most new AMD motherboards have a special place to plug the heat sink fan into. If the board does not detect this fan connected, it will shut itself down in a few seconds. This is a safty feature built in to help save the cpu if somebody forgets to hook up the fan.

If the heat sink you have is getting warm after a couple of seconds, I think you should get a good sink before going further.

The deal with the 115/230 switch on the back is bad contacts...and when you switched it back and forth, it wiped the contacts clean...this may be a problem for you from now on...and I think if it were myself, I would try to have it replaced.

[dbl_0527]

Well, I have a volcano2 on the way along with some arctic silver2. I was planning on getting these anyway so no big deal. When I get home tonight, I'll take a picture of this Duron that I have in there now and let you look at it. That processor may be damaged anyway, it has some old thermal tape on it and the L bridges may be damaged, but I'll probably do this over at the CPU forum.

Anyway, back to the board. I don't have the manual with me, but I did see where there were mulitple places to plug in the fan, I didn't try all of them however. I'll get back with you when i have the manual. If all this works correctly, then i will be getting a new case/psu.

[Bovon]

Yes there are several places to plug in "A" fan...but only one that is specfically designed to place the heat sink fan. This fan circuit probably has a sensing device to tell the system that a fan is connected.

[dbl_0527]

Go to this link to get the manual for the A7V133 (not the A7V133-M): http://www.asus.com/products/Motherboard/manual_socka.html

It's a .pdf, so you'll need Adobe Acrobat Reader. You can try to follow the provided link, but my browser hung, so I just downloaded it and opened from my HD.

Page 14 shows a pretty good layout with my choices for the fan connector. With your information about the fan needing to be in a particular connect, i assume it has to be in the one labeled CPU_FAN. I'm pretty sure I have it in PWR_FAN (it was the first one I saw). Can you take a look and see where my HSF needs to be plugged into?

[Bovon]

Well, I downloaded the manual...geeeze, 108 pages, takes awhile dosn't it?

Ok, I went thru all 108 pages (skimmed over most), and the manual does not actually say to place the cpu fan there, but it it generally known that a fan for the cpu heatsink MUST be placed on the header provided for that particular fan. If you look at the pic of the mobo on page 13, you can see where the fan header for the northbridge is, and the fan is attached to the correct header...F_FAN. The cpu must be attached to the header CPU_FAN.

Check to be sure that the socket on the new fan that will come with the new heatsink has the wires going to the correct place in the socket. The header shows that the middle pin is for the 12 volts. The wire from the fan that needs the 12 volts should be red. The ground pin is on the outside of the header. The ground pin will be on the right hand side as viewed when looking at the board with the cpu socket at the top, and closest to the northbridge. The ground wire coming from the fan should be black. The other pin on the other...outside, nearest the F_FAN header is for the RPM monitor...not all fans have this third wire for rpm monitoring. If yours does not have but two wires coming from the fan, place the connector on the header with the red wire going to the middle pin, and the black wire going to the outside pin nearest the northbridge chip. If it does have all three wires, I don't know what color the third wire will be for rpm monitoring...maybe green?...