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In removing ult-lsp650p power supply would not turn-on when touching the green wire to the black wire

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Power Problem

I recent lost power only to find that my dell pc would not power up after the power had been restored. After doing some searching at work I read that it might be a problem with the usb ports. I unplugged all of my usb devices to inspect the ports. I did not see anything out of the ordinary.

I was at a loss when I decided to try to turn it on while everything was unplugged. The machine powered up as normal. I have lost power again since that first time and the same thing worked again. I found that if it will not power up, unplug it and disconnect all usb devices. After a few minutes try to turn it on again. I think that you will find that it will power up without the usb devices plugged in. Give it a try.

I am not a pc expert, but I believe that it is pretty obvious that dell has some electrical problem with their usb ports. The large number of people complaining of this problem is evidence enough for me. I have read that many have replaced the power supply and the machine will still fail to power up.

Does anybody know if this sounds like faulty usb ports or perhaps a motherboard problem?

Posted on Jan 14, 2008

  • 68 Answers

SOURCE: Will testing the power supply by shorting the

OH YES!!! dont even try that not only will it damage your system it might also damage YOU!!! if you are worried about your power supply check the connections from the power supply to the motherboard WHILE THE SYSTEM IS NOT PLUGGED IN!!! and if all connections are connected SECURELY than try to plug it into a different outlet

Posted on Oct 24, 2009

Testimonial: "Thank you Soo much! You saved my life! Also I appreciate your quick response."

pgh_pa_guy
  • 2992 Answers

SOURCE: Gateway 503gr has no power

Disconnect everything from the motherboard except the power supply connections and cpu fan. Install one stick of RAM and connect your monitor. Then try starting up. See if you get any BIOS boot messages. This will tell you that the board and processor are okay.

With what you say you've tried already, I'm thinking you might have a bad processor. Most every other problem would result in some kind of error like POST beep codes or messages on screen. If the system still doesn't boot with the bare minimum parts installed, replace the processor.

Posted on Mar 02, 2010

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Hp compaq 945 dosent turn on


Bypass the Power On switch. This will tell you if the problem is the Power On switch, or the Power Supply.
Has nothing directly to do with the Power On switch, or it's wires.

A jumper wire is used on the 24-pin ATX main power cable's connector.
Jumps from the green Soft Power On wire to ANY Black wire,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The preferred jumper wire is a paper clip.
The paper clip is straightened out, then bent into a U-shape.
The top of the U is wrapped a few times with black plastic electrical tape.
This tape area is for your fingers and thumb to hold onto.

Turning the U-shape upside down the 'Legs' are what is used.
One leg goes down into a socket hole with the Green wire.
The other leg goes down into a socket hole with ANY black wire.
ALL Black wires are Ground wires.

The BACK of the 24-pin ATX main power cable's connector, is where the wires go into it.
The leg of the U-shaped paper clip, goes down into the socket hole with the Green wire, RIGHT NEXT TO THE WIRE.

Right next to the green insulation of the wire.
The 'leg' has to go pretty far down in the socket hole.
It has to go far down in the socket hole, and TOUCH the metal terminal at the end of the wire.

The other leg of the U-shaped jumper wire has to go down into a socket hole, with ANY Black wire in it. It also has to touch the metal terminal at the end of the Black wire, down in that socket hole.

[All wires going into the 24-pin ATX main power cable's connector, end in a metal terminal,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

The Back of the metal terminal is the left side. The tangs on the left side, have not been crimped down on a wire yet. (Insulation)
The jumper wire touches this side.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The Front of the metal terminal is the right side. The opening of the metal terminals, and Front side, can be seen in the middle photo of the Playtool link,


Power Supply plugged into power; 24-pin ATX main power cable plugged into the motherboard, as shown in the photo to the far right in the Playtool link above.

The contact period of the U-shaped jumper wire is Brief.
No more than 2 seconds. The Power On switch is a Momentary Contact Switch.

IF, the Power Supply comes on you have a bad Power On switch.
IF, the Power Supply does NOT come on you have a bad Power Supply.

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 21, 2012 | HP Compaq Business Desktop dc7700 -...

1 Answer

PC won't power up


Power On Switch:

Use a jumper wire from the Green wire to ANY Black wire, in the back of the 20-pin ATX main power cable's connector.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

The Green wire is the Soft Power On wire. Abbreviated as PS_ON)
ANY Black wire, you see going into the back of the main power cable, is a Ground wire.

The main power cable is plugged in, as shown in the photo to the far right. The Back of the connector is where the wires go in.

The preferred jumper wire is a straightened out paperclip, and bent into a U-shape.
The middle of the U is wrapped a few times with black plastic electrical tape.
This taped area is for your fingers and thumb to hold onto.

Turn the U upside down, and the 'legs' are what is used.

One leg slides down into the Green wire's socket hole, RIGHT NEXT TO the Green wire.
Has to go pretty far down in the socket hole, as it has to touch a metal terminal, at the end of the wire,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

[The back of the terminal where the jumper wire touches, is to the left. The tangs on the left, haven't been crimped over the insulation of a wire yet.
The right side, is the round tip that is seen in the middle photo, of the connector in the Playtool link ]

The other 'leg' goes down into ANY socket hole, with a Black wire in it. Slides past the insulation of the wire, and touches the metal terminal at the end of the wire.

Power Supply is plugged in, jumper wire is used.
The contact made is no more than 2 seconds.
The Power On switch is a Momentary Contact Switch.

Power Supply comes on you have a bad Power On switch.

You can also test a Power On switch with a multimeter. Just be aware as said, it is a Momentary Contact Switch, and you will get brief readings on the multimeter, every time you push the switch.
(IF, the switch is good)

http://www.directron.com/atxswitch.html

Motherboard:

Check the Electrolytic Capacitors.
(Radial Aluminum Electrolytic Capacitors)

http://www.capacitorlab.com/visible-failures/index.htm

Visually check for signs of failure.

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 09, 2012 | Intel Desktop Board D865GBF (MBIND865GBF)...

1 Answer

Dess inspiron 531 will not power up


Let's start with diagnosing whether the problem is the Power On switch, or the Power Supply.

The test does not involve the Power On switch. You are going to bypass the switch.


Dell Support > Inspiron 531s Desktop PC > Owner's Manual,

http://support.dell.com/support/edocs/systems/insp531s/en/OM/html/index.htm

Removing and Installing Parts > System Board Components,

http://support.dell.com/support/edocs/systems/insp531s/en/OM/html/parts.htm#wp1184332

[Removing and Installing Parts section also has, Removing the Computer Cover ]

View where Number 8 points to.
main power connector (ATX_POWER)

It is a whitish connector with 24 socket holes.
The 24-pin ATX main power connector on the motherboard.
You will see something more like this,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

[Photo to the Right. Note color of connectors does NOT matter ]

See the Green wire? That is the Soft Power On wire. Abbreviated as PS_ON.
{Power Supply On }

ALL the Black wires you see are Ground wires. You are going to briefly jump the Green wire to ANY Black wire.
The preferred jumper wire is a paper clip.

The paper clip is straightened out, then bent into a U-shape.
The middle of the U is wrapped a few times, with black plastic electrical tape.
This taped area is for your fingers and thumb to hold onto.

The U shape is turned upside down. The 'legs' are what is used to go down into socket holes, with the Green wire, and ANY Black wire.

Viewing the photo to the right, note the wires going down into the squarish socket holes.
One 'leg' of the U-shaped jumper wire, goes down into the socket hole with the Green wire, and RIGHT NEXT TO THE wire.

Slides down past the green insulation of the wire, and touches a metal terminal. Every power wire going into that connector, ends in a metal terminal. Looks like this,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

You can see the front of them in the middle photo. Brass looking with a small hole in the center.
You MUST make sure the leg of the jumper wire, goes down into the socket hole far enough, that it touches the metal terminal. It is pretty far down in there.

Power supply plugged into power, taped portion of U-shaped jumper wire held, guide one leg into the green socket hole, and the other leg into any black wire socket hole.

[Shock? The Soft Power On wire {Green wire } is 5 Volts DC.
In comparison two D cell flashlight batteries store 3 Volts DC.
However there may be a spark. Just warning you so you don't freak out. lol! }

The contact period mad is no more than 2 seconds.
IF, the Power Supply comes on, you have a bad Power On switch.

IF, the Power Supply does NOT come on, you have a bad Power Supply.

Example of an ATX power on switch,

http://www.directron.com/atxswitch.html

[The Power On button is a plastic assembly. A type of ATX power on switch is installed inside. The above example is used in a LOT of desktop computers ]

If you need guidance in replacing your Power Supply, post back in a Comment.

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 14, 2012 | Dell Inspiron 531s Desktop Computer

1 Answer

What pins are the switch to turn on power supply continuously


Pins 16 and 17 for a 24-pin ATX main power cable connector, and Pins 14 and 15 for a 20-pin ATX main power cable connector.

1) 24-pin ATX main power cable and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24


2) 20-pin ATX main power cable and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Just remember; The Green wire is the Soft Power On wire, (PS_ON)

ANY Black wire is a Ground wire.

A jumper wire is used briefly to touch the green wire to ANY black wire.

The preferred jumper wire is a paper clip because of it's size. (Diameter)

The jumper wire goes down into the BACK of the connector, RIGHT NEXT TO THE EXISTING WIRE that is already in there.

The BACK of the connector is where the wires go in. (In the links above look at the photo to the far right)

The 24-pin, or 20-pin ATX main power cable, is plugged into the motherboard.
The Power Supply is plugged into power.

The jumper wire goes down into the socket hole, right next to the existing wire, and far down in the socket hole.
It has to touch a metal terminal that is in the FRONT of the connector.
Each wire going into that connector has a metal terminal at the end of it.

Black plastic electrical tape is wound around the middle of the U shaped paper clip.

Use the jumper wire and the Power Supply comes on?
You have a bad Power On switch.

Power Supply does Not come on?
You have a bad Power Supply

Sep 17, 2011 | Computers & Internet

1 Answer

I have a desktop. when i turn it on nothing happens.


Test whether the problem is the Power On switch, or the Power Supply.

The Power On switch is located inside the plastic Power On button. It's removable in most cases.
This is a typical ATX power on switch,

http://www.directron.com/atxswitch.html

To test you will bypass the Power On switch.

If the Power Supply comes on, you have a bad Power On switch.
If the Power Supply does Not come on, you have a bad Power Supply.

The test doesn't involve the Power On switch, or it's wires.

It involves the 20 or 24-pin ATX main power cable, the Soft Power On wire, (Green), and ANY Ground wire.
(Black)
A jumper wire is used from the Green wire to ANY Black wire.

Computer unplugged from power, observe Anti-Static Precautions, BEFORE you reach inside.

Anti-Static Precautions:
Your body carries Static electricity.
Static will fry out (Short Circuit) the hardware components inside a computer.
Computer unplugged from power, TOUCH the metal frame of the open computer case. Touch an unpainted surface.

This action will relieve your body of Static.
Should you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

You may have to ease a few cables over to view the motherboard.
You are looking for the 20, or 24-pin ATX main power cable.
(Don't know if your model uses a 20-pin, or a 24-pin.
This is what you're looking for,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Scroll down to see the 24-pin ATX main power cable.
Look at the photo to the far right.
The Green wire is the Soft Power On wire.
ANY Black wire is a Ground wire.

With the ATX power cable plugged into the motherboard, as shown in the photo to the far right, you are going to insert a jumper wire down into the socket holes.

The jumper wire goes down in the socket hole, Right next to the wire that is in the hole.
It goes down in far enough to touch a metal terminal, that is at the end of the wire.
(Approximately 1/2 inch)

The jumper wire of choice is a paper clip straightened out, then bent into a U-shape.
The middle of the U is wrapped a few times with black plastic electrical tape.
(Trivia: One wrap of black plastic electrical tape is enough for 600 Volts DC)

The voltage you will be dealing with is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.

You may wish to wear a glove on the hand that holds the jumper wire. There may be a small spark.
The Power Supply, (Computer), is plugged into power.

One end of the U-shaped jumper wire, is inserted down into the socket hole with a Green wire. (Right next to the wire)
The other end is inserted down into a socket hole with ANY Black wire.
The contact made is no more than 2 seconds. (1001, 1002)

If the computer comes on, (Power Supply actually), the Power On switch is bad.
If the computer does not come on (Power Supply), the Power Supply is bad.








Oct 20, 2010 | Acer (56.04145.901) (5604145901) Power...

1 Answer

Emachine ET1810 is not powering on already replaced the power supply


You may have a bad Power On switch. The Power On switch is located inside the plastic Power On button.

This is a generic ATX power on switch, that I have found works in many computers,

http://www.directron.com/atxswitch.html

Have you bypassed the Power On switch?
If you bypass the Power On switch, and the Power Supply comes on, you have a bad Power On switch.
If you bypass the Power On switch, and the Power Supply does Not come on, you have a bad Power Supply.

Sometimes a new Power Supply can be bad.
Make SURE the ATX main power cable is plugged in tightly.

(I have had an instance recently where I bypassed the Power On switch, and the Power Supply came on, but only as long as the jumper wire was in place. Remove jumper wire? Power Supply went off. Removed the jumper wire, then pressed the Power On button. The Power Supply came on )

Bypassing the Power On switch has nothing to do with the switch itself, or the wires to the switch.
A jumper wire is used in the connector for the ATX main power cable.

My sources indicate the ET1810 uses a 24-pin ATX main power cable.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

A jumper wire is used to connect the Green wire (Soft Power On. Also abbreviated as PS_ON) to ANY Black wire. (ALL Black wires are Ground wires)

Looking at the photo to the far right, you will see the Green wire goes down into a socket hole.
This is the Back of the connector.
The jumper wire goes down into the socket hole RIGHT NEXT to the Green wire.
The jumper wire has to go down into the socket hole pretty far.
(Approximately 1/2 inch)

At the end of the Green wire is a metal terminal. The jumper wire has to go down into the socket hole, far enough to touch that metal terminal.
Same thing for ANY socket hole with a Black wire.

(The Green wire is the Soft Power On wire. It is a 5 Volt DC wire. The Black wires are Ground wires.
The jumper makes a circuit from the Soft Power On wire to a Ground wire)

The jumper wire usually preferred is a paper clip straightened out, then bent into a U-shape.
The middle of the U is wrapped with black plastic electrical tape.
This is where your fingers hold the jumper wire.

One end of the jumper wire goes down into the socket hole with the Green wire.
The other end of the jumper wire goes down into a socket hole with ANY Black wire.
The contact is no more than 2 seconds.


My sources indicate the motherboard is an ECS MCP73VT-PM
(EliteGroup)

Oct 10, 2010 | eMachines ET1810-01 PC Desktop

1 Answer

Power light on power supply is on, but won't turn on when you push the power button on the front of the computer. No fans run nothing.


Bad Power On switch. (Located inside the plastic Power On button), or Bad Power Supply. Weak voltage power rail.

Bypass the Power On switch to see if the switch is the problem, or the Power Supply.

To perform this procedure you will be using a jumper wire to touch the Soft Power On wire's terminal contact, (PS_ON. Green wire), to ANY Ground wire's terminal contact, (Black), in your 24-pin ATX main power cable's connector. Brief contact, no more than 2 seconds.

Main power cable remains plugged in. The jumper wire can be a paper clip straightened out, then bent into a U-shape. The bend of the U is wrapped with electrical tape.

The legs of the U go down into the socket holes of the Green wire, and ANY Black wire. (ALL Black wires going down in that connector are Ground wires)

You have to make sure the jumper wire touches a metal terminal contact, that is down at the bottom of the wire.
The jumper wire is slid down next to the wire, in the socket hole.

The voltage is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.

1) http://support.gateway.com/s/PC/R/1015003R/1015003Rnv.shtml

2) http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Sep 30, 2010 | Gateway GT5662 Desktop PC

1 Answer

No lights turn on, game doesn't turn on. Appears Dead..


If this is in a computer and the computer does nothing at all when you push the power button you might want to check the power supply. This can be manually done on an ATX power supply both 20 and 24 pin connections. First you remove the main system power cable from the mother board " big rectangle one " and locate the green wire. After you have found it use a paper clip bent in a U and touch the green wire and ANY black wire " all blacks are ground " This will turn on a power supply if its good. If your power supply fails to start i would look into buying a new one.

Aug 02, 2010 | Computers & Internet

1 Answer

When i turn the power on the green power supply light goes out and doesnt turn onand the computer wont turn on


Follow these:
  1. Unplug the computer.
  2. Disconnect the power supply from the motherboard and all other accessories.
  3. Replug the power supply.
  4. Connect the green wire (PSON) of the power supply by way of a jumper wire to any black wire (ground).
  5. The power supply should turn on with its fan. If not, it is defective and should be replaced.
  6. Check the ATX12V connector of your motherboard. It is were you removed the 4-wire, 2 yellow and 2 black, connector of the power supply. Check the continuity of the yellow wires to the black ones. It should be open, otherwise it is shorted and your processor is defective and should be replaced.






Aug 19, 2009 | E-Machines Emachine T5026 power supply **...

1 Answer

My computer light turns on then off, no fan no screen


Changed the power supply and Power On switch?
New parts? Okay. We'll come back to them. For now, lets look over some simple things.

I can tell you that even after 20+ years as a tech, I still get a little zealous, when it comes to building computers. Sometimes we get into a rush, and overlook the simple things.
1.Are you sure the 20/24-pin motherboard power cable, is in tight, and down in there?

2.Are you sure the Front Panel connector, is connected right on the motherboard? Some Front Panel's have individual wires with terminal ends, that go on separate pins on the motherboard Front Panel header.
I'm asking are you sure the Power On switch is connected to the right pins, on the motherboard Front Panel header.

Everything good so far? Okay, lets look at the motherboard.
Look at the Electrolytic Capacitors on the motherboard. Specifically the ones that surround the processor. See if they show obvious signs of being bad.
Here is a link that will show you what Electrolytic Capacitors look like, and the visual signs of failure of them,
http://www.capacitorlab.com/visible-failures/index.htm

Good so far? Okay, lets check out that power supply, and at the same time, check out the Power On switch. Even if these items are brand new, they can still be bad.

I need you to make a jumper wire. This is to jump the Soft Power On, part of the power supply.
Wire needs to be like the power supply connector wires. That thick. It needs to have insulation on it. Should be 3 inches long, and have about 3/4th's of an inch of insulation, removed from each end.
Twist the ends tight, and into a pointed shape. Bend the wire into a U shape.

The 20/24-pin motherboard power cable, needs to be plugged into the motherboard. Where the wires go into the connector, there are socket holes. For every wire going down in there, there is a metal terminal end, on the end of each wire. The metal terminal end is pretty far down in there. Your jumper wire must go down in the socket hole, with the wire that is in the socket hole now.

You will see a Green wire, and a bunch of Black wires. The Green wire is the Soft Power On wire.
ANY Black wire is a Ground wire.
You want to jump across the Green wire, to ANY Black wire. (You can use the Black wire that is next to the Green wire. Just wanted you to know that you could use ANY Black wire you see)

Computer plugged into power. You may want to wear a glove on the hand that plugs the jumper wire in. The reason is that there will be a spark.
Not a big one, but I want you to feel safe.
Just stick one end of the jumper wire, down in the Green wire socket hole. Make sure it's deep enough to touch that metal terminal end. Now since the jumper wire is a U shape, just stick the other end in the Black wire socket hole.

You only want to touch it momentarily. Around 1 to 2 seconds. Then remove it.

If the power supply comes on, you have a bad Power On switch, or bad Front Panel header on the motherboard. If the power supply doesn't come on, you have a bad power supply.

With the power supply running, you can see if your motherboard is bad or not. I have seen VERY FEW motherboards, that have a bad Front Panel header. (Header is a -> Connector <- when referring to the motherboard)

Apr 28, 2009 | Smart Modular SV3170A

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