Almost as the above.
Bypass the Power On switch, using a jumper for the Soft Power On, of the Power Supply.
If bypassing turns the Power Supply on, you have a bad Power On switch.
If bypassing does Not turn the Power Supply on, you have a bad Power Supply.
[The Power On switch, is located inside that plastic Power On button. I have found that this generic Power On switch fits many computers,
http://www.directron.com/atxswitch.html ]
To bypass the Power On switch, and use the Soft Power On of the Power Supply, a jumper wire is used to Temporarily connect the Soft Power On wire, and ANY Ground wire.
The Dell Dimension 5100 desktop computer uses a 24-pin ATX main power cable.
Dell Support > Dimension 5100 > Technical Overview > System Board Components,
http://support.dell.com/support/edocs/systems/dim5100/en/sm/techov1.htm#wp1058472
On the motherboard (System Board) illustration shown, look down the right hand side.
Power Connector (ATXPWR1), points to the female socket on the motherboard, where the 24-pin ATX main power cable plugs into.
Scroll down the page a little more, and you will see the heading -
Power Supply DC Connector Pin Assignments.
I would like to refer you to the heading underneath it,
DC Main Power Connector 1.
This is the end view of the 24-pin ATX main power cable connector.
Looking at the illustration of the connector, you are looking at the Front.
Below this illustration is a chart detailing the Pin Numbers, (Socket holes in the connector)
It also details what the Signal Name is of each wire.
Lastly it details the color of the insulation on the wire.
This will make more sense in a moment.
This is a closer look at a typical 24-pin ATX main power cable, and it's respective connector.
http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24
The Middle photo shows the Front of the connector.
The 24-pin ATX main power cable, is unplugged from the motherboard.
A typical female connector for the 24-pin ATX main power cable, is shown on the Left. (Not a photo of a Dimension 5100 motherboard)
The 24-pin ATX main power cable is shown plugged into a motherboard, in the photo to the Right.
With the Power Supply UNPLUGGED from power, AND the 24-pin ATX main power cable still plugged into the motherboard, a jumper wire is used. (Not shouting)
The jumper wire is inserted into the Back of the connector.
One end is inserted down into the socket hole that has a Green wire in it. Right next to the wire. (Soft Power On. Also stated as PS-ON)
The other end is inserted down in to a socket hole, with ANY Black wire.
ALL Black wires are Ground wires.
They all end in one central Ground terminal.
The touch is MOMENTARY. A brief contact.
No more than two seconds.
The Power On switch is a Momentary Contact Switch.
I suggest using a jumper WIRE, because there will be a spark.
The Voltage is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.
Not necessarily harmful, but you may be angry if you do this procedure, see a spark, and are not Warned ahead of time.
Or use a paper clip, and get sparked.
This is why I suggest using a jumper wire that has insulation on it.
You may also wish to use a glove on the hand that inserts the jumper wire.
Doesn't take a very large gauge of wire.
The jumper wire is approximately 3 inches long.
It is bent into a U shape.
1/2 inch of insulation should be removed from both ends, and the bare ends twisted into a point.
For each wire that goes down into a socket hole of that connector,
(24-pin ATX main power cable connector), there is a metal terminal.
The metal terminal is a female socket.
This metal terminal is pretty far down in the connector.
When you insert the jumper wire ends, you must ensure that the bare ends touch that metal terminal.
My method is to have the Power Supply unplugged from power.
I insert one end of the jumper wire down into the Green wire socket hole, ensuring that it is touching that metal terminal.
I then plug the Power Supply into power, and insert the other end of the jumper wire, into ANY socket hole that has a Black wire in it.
Power supply comes on, you have a bad Power On switch.
Power Supply does Not come on, you have a bad Power Supply.
The Soft Power On feature, was implemented to take the place of the older style, of turning on a Power Supply.
With the much older style, there was a metal rod that was pushed by the Power On button.
This metal rod in turn pressed against a Power On switch located inside the Power Supply.
Next implementation involved using a heavily insulated cable of wires, that came from the Power On switch, located in the Power On button, and led over to the Power Supply.
Now there is the Soft Power On.
When a Power Supply is plugged into power, there is always 5 Volts present in the Power Supply.
5 Volt Standby Power.
This 5 volt standby power is routed through the Power On switch, and back to a Ground, via pressing the Power On button.
The 5 Volt standby power excites a circuit within the Power Supply, and the Power Supply turns on.
If you have any questions please state in a Comment.
Believe upper right of your page.
(We are constantly undergoing changes to improve our website.
JCV - Expert Moderator)
Yeah I have seen switches fail a few times, its rare though, trace the wire back to your motherboard and disconnect the lead, then short the pins. If it comes on replace the switch, if it doesnt reset the bios via a the jumper and try again, disconnect the long ATX cable from the mother board and all power connectors from peripheral devices and on the Long ATX connector that was connected to the motherboard you will see a green wire, connect your mains to the power supply and short the green wire on the ATX connector with the black wire next to it, the power supply should fire up, if it doesnt try a new power lead and outlet, if it still does not fire up its your powersupply. If however you power supply does power up you should reconnect everything and try your power switch and shorting power switch pins on motherboard again, if the power supply does not come on then yor motherboard should be replaced.
Notes735 views
Usually answered in minutes!
×