Help with power supply

[dsj]

How does the power supply know when to power up? Is it by the power fan plug plugged on to the motherboard?

 

[dsj]

The problem is that my computer won't power up. And the power supply doesn't have a power fan plug.

 

[dsj]

My case isn't an ATX case. Does that matter?

 

[The Boston Dangler]

It turns on when you press the POWER button. The button is connected to the motherboard, and the mobo tells the PS to crank up. Flip the switch on the back of the power supply.

 

[dsj]

I already did. It's supposed to be set to that horizontal line and not the hollow circle right? But how does the mother board tell the power supply to crank up? Using what kind of connection?

 

[dsj]

Can the power switch be bad.

 

[The Boston Dangler]

According to the ATX standard, pressing the momentary switch closes an always-on circuit, through the mobo, into the PS. That triggers the PS to go to full power. The old AT standard has all of the power leads going through the switch, which is terrible. Yes, the switch can be bogus.

If your computer isn't ATX, what is it? Are you sure you have power on the AC outlet? Is everything plugged in?

 

[dsj]

I can't think of anything that's not plugged in. Except for the 4 pin power plug. But the Asus board didn't have that port on it. How do I know if the computer is ATX or not?

 

[The Boston Dangler]

Didn't you say it wasn't an ATX case? If it's less than 10 years old, it's most likely ATX.

Was it working, and then just stop? Or is it something you just put together?

 

[dsj]

I just put that thing together. The case is 39 canadian with a 300 watt power supply. I think the power button is broken. Is that the most likely problem? I just assumed that it isn't an ATX case because it's cheap.

 

[UsandThem]

Originally posted by: dsj
I just put that thing together. The case is 39 canadian with a 300 watt power supply. I think the power button is broken. Is that the most likely problem? I just assumed that it isn't an ATX case because it's cheap.

The case has an included power supply for 39.00 Canadian? Isn't that like $1.50 US (sorry I forgot our dollar has no value anymore).

That could be your problem there. What is your system?

 

[dsj]

Originally posted by: UsandThem

Originally posted by: dsj
I just put that thing together. The case is 39 canadian with a 300 watt power supply. I think the power button is broken. Is that the most likely problem? I just assumed that it isn't an ATX case because it's cheap.

The case has an included power supply for 39.00 Canadian? Isn't that like $1.50 US (sorry I forgot our dollar has no value anymore).

That could be your problem there. What is your system?

You mean the specs?

Athlon xp 3000+
512 MB ram ddr 400
40 GB maxtor
52x rewriter (CD) samsung
some power supply that works

I think it's the broken power button. Doesn't matter if it's cheap. It has a one year warranty.

 

[The Boston Dangler]

It matters if it doesn't work at all.

That 4 pin power plug should go somewhere.
There's a 20-pin and a 4-pin coming from the PS, eh? 20 on the mobo, there's 4 left over. That will stop a puter dead in it's tracks.

 

[dsj]

the motherboard doesn't have a 4 pin power plug. MY nforce 3 MB has one but the asus one doesn't have it. You can check the manual. I think the power switch is broken.

 

[dsj]

I know you can do something to the motherboard like connect some jumpers to power up the computer. What was that procedure again? I want to see if it's the power switch's problem.

 

[UsandThem]

Originally posted by: dsj
I know you can do something to the motherboard like connect some jumpers to power up the computer. What was that procedure again? I want to see if it's the power switch's problem.

The power switch simply shorts the two pins. You can do that with a screwdriver as well.

 

[dsj]

Thanks. So I just connect those pins with a screwdriver then it will power on?

 

[UsandThem]

Originally posted by: dsj
Thanks. So I just connect those pins with a screwdriver then it will power on?

yes.

Just touch both to a metal surface for a split second.

 

[dsj]

I tried and it didn't work. So it's not the switch. But I can't figure out what's wrong. It won't even power up. The motherboard's led is on when the power is plugged in but the computer won't start.

 

[UsandThem]

Originally posted by: dsj
I tried and it didn't work. So it's not the switch. But I can't figure out what's wrong. It won't even power up. The motherboard's led is on when the power is plugged in but the computer won't start.

You are touching the metal parts of the power switch wires right?

 

[dsj]

Yes. The 4th and 5th pin. I connected them with a screw driver and a copper wire. the motherboard used to work before with another case and PS. What could be wrong? The mother board really didn't seem to have a 4 pin power plug. Only the 20 pin one.

 

[UsandThem]

Originally posted by: dsj
Yes. The 4th and 5th pin. I connected them with a screw driver and a copper wire. the motherboard used to work before with another case and PS. What could be wrong? The mother board really didn't seem to have a 4 pin power plug. Only the 20 pin one.

What is your motherboard model #?

 

[dsj]

Asus A7N8X deluxe
Is that what you meant?

 

[UsandThem]

Originally posted by: dsj
Asus A7N8X deluxe
Is that what you meant?

Could be a dud power supply or motherboard.

With Asus's quality, I would lean towards the power supply at this point.

 

[dsj]

What is dud? But the motherboard led does light up when power is plugged in. How do I know if it's the PS' problem?