Question about Dell C600 (002UH) Motherboard

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Power Connection The power into the laptop doesn't stay connected. I have to move the plug up/down until the LED comes on and then don't touch the laptop. Have tried 3 different power cords with same results. It is getting harder and harder to get the plug just right to get it charging the battery. Opened laptop and connections look good. Considering replacement of motherboard as an option. Ideas?

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  • gleach Jul 30, 2008

    The pins don't seem to move much. Is the DC Jack a separate component from the motherboard that can be replaced?

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The solution is to repair/replace the power pin assembly. Available on the web for $ 10-$20. Should only take you a couple of hours to disassemble, repair and reassemble the laptop. In the meantime you can get one of these to help hold the plug in the "right" position. Every laptop should come with one.

Posted on Mar 12, 2009

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Sounds like the DC jack on the computer has come loose or is broken. Use a small screwdriver and see if the jack on the computer has any movement to it. If it does, then the jack needs replaced. You should replace it ASAP, a loose or broken jack can create an electrical arch, which can do severe damage to the machine.

Posted on Jul 30, 2008

  • Ryan Rogers
    Ryan Rogers Jul 30, 2008

    The jack is soldiered onto the motherboard, but it is replaceable. There are three pins on the jack that are soldiered into holes on the board, heat up the soldier, remove the old jack, clear the holes, and soldier the new jack in place. That easy!!! I get replacement jacks from Ebay for $4 to $6.

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1 Answer

No power when plugged into ac


When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

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1 Answer

Laptop will only charge when sidewards pressuse is put on connection at back of laptop


When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

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No power my laptop computer but good battery and adaptor or charger


When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

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1 Answer

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1 Answer

My motherboard is getting power from a 450w smps coz the board LED gets on when I switch on the ups. But pressing the power button on the cabinet does not switch on the system. Please help!!!!


From your diagnoses you may have a bad Power On switch, or a bad Power Supply.

Reasoning?

An ATX power on switch is connected to the motherboard's Front Panel header.
From there the circuit is continued through the ATX main power cable, and into the Power Supply.

The Power On switch connects the Soft Power On wire, to Ground.
(The Soft Power On wire is abbreviated as PS_ON. The wire is Green)


If the Power On switch is bad the Power Supply will not turn on.


A bad Power Supply will have a weak voltage power rail, (Or more than one)
Enough power to light LED lights, and perhaps spin fans, but not enough power to turn the Processor on.
No Processor operating, no computer.

1) If all of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts.

3) A typical Processor can use from 51 to 125 Watts. Depends on what Processor it is.
(Older Intel Pentium III's, and comparative AMD processors used less than 51 Watts)

You may have enough power to light that LED light, but not enough to spin fans, or turn the Processor on.


There is a simple test to see if the problem is the Power On switch, or the Power Supply.
Bypass the Power On switch.

A jumper wire is used to temporarily connect the Soft Power On wire to ANY Ground wire.
The connection is made at the Back of the ATX main power cable's connector, with the ATX main power cable plugged into the motherboard, and computer plugged into power.

1) The Asus M2N-MX (And SE version) motherboard uses a 24-pin ATX main power cable.

http://www.asus.com/Motherboards/AMD_AM2/M2NMX_SE_Plus/

This is one example of a 24-pin ATX main power cable, and it's respective connector on the motherboard,

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

Looking at the photo to the far right, shows the 24-pin ATX main power cable plugged into the motherboard.
This is the position for the test.
(Computer also plugged into power)

The BACK of the connector is where the wires go into the connector.
The jumper wire is used on the Back side of the connector.

One end of the jumper wire goes down into the socket hole with the Green wire.
(Soft Power On wire)
The other end of the jumper wire goes down into ANY socket hole with a Black wire in it.
ALL Black wires are Ground wires.

The jumper wire goes down into the socket hole RIGHT NEXT TO the existing wire.
The jumper wire MUST go down into the socket hole far enough to touch a metal terminal.

At the end of every wire going down into the ATX main power cable's connector, is a metal terminal.
The metal terminal is pretty far down in the socket hole.

The preferred jumper wire used is a paper clip.
The paper clip's diameter is small enough, to go right next to the existing wire in the socket hole, and touch the metal terminal.

The paper clip is straightened out, then bent into a U-shape.
The 'legs' of the U-shape go down into the two socket holes.
The middle is wrapped with a few wraps of black plastic electrical tape.
The taped area is for your finger, and thumb to hold onto.

The voltage is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.
There may be a small spark when you make the connection, advising you in advance.

The connection made is no longer than 2 seconds.
(The Power On switch is a Momentary Contact Switch)

Computer comes on, (Power Supply actually) you know you have a bad Power On switch.
Computer does Not come on, you know you have a bad Power Supply.

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

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2 Answers

The LED in my motherboard is on, but if i turn on the switch, their is no response. the power connection is correct. but it doesn't work


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2 Answers

Just got mobo and set, fan doesn't start, mobo doesn't give any sound nothing moves....did basic removal of mem and unneccesry one by one and still nothing...


Power. Start with power.

1) Make sure the 24-pin ATX main power cable is plugged in tightly to the mobo.

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

Ensure that the lock on the male connector (Power cable) is snapped over the tab on the female connector. (Mobo)
Push down on each wire to ensure it's metal terminal connector, is plugged on tightly to each pin.

Looking at the middle photo you are looking at the Front of the connector.
Looking at the photo to the far right, you are looking at a side shot, and the back of the connector. The back is where the wires go in.

Each wire ends in a metal terminal connector.
The metal terminal connector is shaped like a tube, so that it will slide on the pins in the mobo's ATX main power connector.

The metal terminal connector also has two locking tabs. One on each side.

http://www.alibaba.com/product-gs/292070393/male_and_female_crimp_terminal_connectors.html

Sometimes there may be a problem with the locking tabs. The metal terminal connector is not tightly on the pin. May not even touch the pin. Check each wire in the 24-pin ATX main power cable's connector. Push in on each one.

Everything is fine so far?
Perform the diagnostic test to see if the problem is the Power On switch, or the Power Supply.

Use a jumper wire on the back of the 24-pin ATX main power cable's connector.
Touch the jumper wire from the Soft Power On wire to ANY Ground wire.

The Soft Power On wire is the Green wire.
ANY Black wire you see is a Ground wire.
(Soft Power On is also abbreviated as PS_ON)

The general type of jumper wire used is a paper clip.
Thin, and stiff, plus a conductor of electricity.
The paper clip is straightened out, then bent into a U-shape.

Black plastic electrical tape is wrapped around the middle of the U.
This area is for you to hold onto the jumper wire.

The 'legs' of the jumper wire, go down into the appropriate socket holes, in the BACK of the 24-pin ATX main power cable's connector.

One leg goes down into the socket hole with the Green wire (PS_ON), and the other leg goes down into a socket hole with ANY Black wire.

The paper clip goes down into the socket hole RIGHT NEXT TO THE EXISTING WIRE that is already present.
Slides down right next to the wire, and touches the metal terminal.

The metal terminal is pretty far down in there.
Ensure that the paper clip is touching both metal terminals on the Green wire, and any Black wire.

Power supply comes on? You have a bad Power On switch,

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

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

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

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1 Answer

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Check power adapter’s DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced.
If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

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2 Answers

Asus P4GE-MX


If you have your manual you can see how to connect these on pg. 1-22. No manual..
Starting from the right edge of the board moving to your left. Notice there is two rows of pins one above the other. All your case connectors will be connected left to right & not up to down. The first two (BOTTOM ROW) pins are for the reset switch. The connector will have two wires one will be colored white or black. These colored wires are ground & will be the sane for all your connectors. All grounds will face towards the right for both rows of motherboard pins. After plugging in the reset connector SKIP one pin as you move to your left along the bottom row. Plug in your IDE LED connector a two wire connector. Moving to the top row across from the ide led, plug in the Power Led. It is a two wire connector. Some case connectors for the power led come in a three pin connector. If yours is like that than you will need to remove the + wire from the connector & slide it over one slot so it is next to the ground & plug it onto the board.
The last two pins is for the Power button. All Asus boards are marked & colored. You need a stronge flash light to see the markings on the board. Good luck!
Don't forget to vote..........

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1 Answer

Motherboard power connections


From my extensive experience trial and error can sometimes be the best solution here, never had any shorts with this solutution. plug the power supply onto the mboard then with a screw driver touch together two pins at a time on themboard following a the pins on the panel horizontally, when you touch together the right two pins your mboard will power-up then insert the on-off plug on those two pins 99.9% of the time they are plugged facing inwards (the writing on the plug faces towards the major part of the mboard) after that you can insert the led plugs by the same consept of trial and error. You must plug your harddriver to your board to find the hdd led because then it will flicker when found the power led will remain on constantly. with the resert button the 99.9% of the time the pins are directly below, above or adjacent to the power-on pins. when it comes to the usb pins check- . . . . .
. . . .
they are in this order above if the spare pin is on the right. starting from left to right, starting with the top row insert - red - white - green - black. the same works for the bottom row.

regards
Casta T.

Oct 26, 2007 | MSI 745 Ultra (MS-6561-010) Motherboard

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