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I have Model ATX0300D5WB in my Dell Desktop. When I connect power to the computer the green LED on the power supply lights up. When I push the power on button on the front of the computer the light goes out and the computer will not power up. What's wrong?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Flashing Green Light on Power BESTEC Power Supply

This is an easy fix so here you go nice and simple:

Problem: Your motherboard circuit has been cut.

Causes: Power disconnected during operation. Power outage or short in the surge protector.

Symptoms: Flashing green light on both motherboard and power supply. System will not power on.

Solution:

Step 1: Ensure that both the power supply and the motherboard lights are flashing green, not solid or off.
Step 2: While the power is on, disconnect the power supply from the motherboard. This connection is the largest of the connections and should be listed as the 'P1' or 'Primary' power connection.

Step 3: Wait until the green light on the motherboard stops flashing and check to ensure that the green light on the power supply is now solid. If it is not solid, disconnect the power to the power supply and wait until the light turns off completely. Then reconnect, it should be solid now.

Step 4: While the power is on, reconnect the P1 connection to the motherboard and you should now see that the light on the motherboard is solid.

Step 5: Power on your PC. The problem should not persist.

Warnings: If the power supply light remains flashing after you have restored power to it while it is disconnected from the motherboard, it may be a system failure in the power supply itself requiring replacement. Always be careful when working with an active or live power machine.

I hope this helped! Good luck!

Posted on Mar 01, 2009

silly girl
  • 513 Answers

SOURCE: Power led flashing...

The described problem might not be the Power Supply Unit, there are a number of different reasons that may cause this symptom. Consulting HP would be advisable.

Posted on Jan 30, 2006

fwadley
  • 482 Answers

SOURCE: power supply light has blinking green light

If the power box is bad, The computer will not come on. if you only get a green light, you would need to start with replaceing the power box, if you get a new one and the same thing happens, then the mother board is bad too.

Posted on Nov 27, 2007

vegakitten20
  • 685 Answers

SOURCE: DESKTOP WON'T POWER UP

it is your power supply it needs to be replaced

Posted on Jan 08, 2009

357reaper
  • 75 Answers

SOURCE: ATX Bestec 1956F Power Supply Failure

sounds like your power supplie has not been switched on by *********** board.the fan will not turn on until power supplie is turned on by mb.as far as what is wrong there are several things i can think of.i would try resetting bios. It sounds like your power supplie is working and your motherboard could have a short.but i have no way to be sure without testing. I can however tell you how to perform a test on your power supplie.unplug the 20 or 24 pin connector from your mb. look for a green wire,and then locate the grey one.short these two together(you can use a paper clip or something).if it dosnt power up. your power supplie is bad.also do not short any other wires,and only touch the grey and green for a few seconds as this is not how it was intended to be powered on.

Posted on Mar 03, 2009

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1 Answer

Flashing green light on the circuit board. No power at all


I suggest it is the mother board or the power supply. Go to the Dell website on a friend's PC and download PDF manuals pertaining to your model. The battery may have enough power to light an LED.

Jan 08, 2014 | Dell Dimension XPS PC Desktop

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Will not start


smor4u,

There is no reset or fuse to reset. You may need to get replacement power supply. If the computer is plugged into a power strip or surge protector you can bypass it and plug the system directly into a wall outlet and power up.
Power Supply Light-on the back of the computer.
The light is a Green Light by the power supply.
Power Supply light is lit by a signal in the power supply called Power_Good (PG).
If the Power Supply Light Led is not light up, the power supply is defective.
If you need to replace the power supply you can contact the Dell Spare Parts Department at 1-877-717-3355bsat4ube4gblqiaaaaasuvork5cyii= or click the link below.

Dell Spare Parts

Thank You,
Dell-Jesse L
Dell Social Media and Communities

Jan 15, 2013 | Dell Vostro 420 Desktop Computer

1 Answer

Not start the OS


This is the Notebook PC category.

Posting, "....and the VoltageS are correctly on the power supply.....makes me think we are talking about a Desktop PC here.

3.3 Volts
5 Volts
12 Volts (All DC)

Green color LED (Light Emitting Diode) referred to, is the motherboard power LED.

All the power cables from the Power Supply, plugged into the motherboard?

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

Or;

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

And;

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Or;

http://www.playtool.com/pages/psuconnectors/connectors.html#eps8

What are the voltages of the SMPS?

http://en.wikipedia.org/wiki/Switched-mode_power_supply

Post back in a Comment as to the computer manufacturer name, and model number. (Plus questions I asked)

Found on the back for a desktop computer, usually next to the Windows product key; or up on the side of the computer tower (Case)
I have seen some models (Dell) that there is a small front door you open, and the model number is down towards the bottom, on the inside. (Of computer, not door)

While I wait for your reply, in the meantime unplug the power cable to the optical drive (CD/DVD drive), and the harddrive.
Remove the Ram Memory.

Plug the computer back into power. Motherboard LED light on?
We are removing some devices that require power, to see if the motherboard LED power light comes on.

Hold the phone..............or are you referencing to the Green LED light that is on the back of the Power Supply?

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&tmp_task=solveCategory&cc=us&dlc=en&lang=en&lc=en&product=432786

Scroll down a little to the photo. That Green LED light?

Regards,
joecoolvette

Dec 17, 2012 | Computers & Internet

1 Answer

My Dell XPS 200 will not turn on.


Have you checked to see if your power supply is still good, or the power supply connection to the motherboard is good?

Sep 14, 2012 | Dell XPS 200 PC Desktop

2 Answers

I got dell optiplex 755 desktop computer in the power supply unit at the back there is a small button and a green light what are these for??


It help diagnose problems with your computer

A solid green light means the computer is operating normally.

A solid yellow:- the power is operating fine but your computer not processing data. This could mean there is a problem with the CPU or another component on the motherboard.

A blinking yellow light: power supply is receiving power from the wall, but not functioning properly. This generally means the power supply itself is bad and should be tested or replaced.

A blinking green light means the computer is in standby mode

Jan 29, 2012 | Dell Optiplex 755 Desktop Desktop Computer...

1 Answer

When i start up my dimension 3100 dell desktop instead of a green light i get a flashing amber light. people say it is the power supply but the light wouldnt even come on if it was. can you please help me?


No, the light WOULD come on if it was a Power Supply problem.

1) If ALL of the LED lights on your computer 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 uses from 51 to 125 Watts. Depends on what Processor it is.

Dell Dimension 3100 desktop computer?
An Intel Pentium 4.

Intel Pentium 4 model 640.
Can operate up to a frequency rate of 3.2GigaHertz. (3.2GHz)
Fits in a Socket 775 processor socket. (Also know as Socket T)

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_4_microprocessors#Prescott_2M_.2890.C2.A0nm.29

Can use up to 84 Watts.


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

Dell Support > Dell Dimension 3100 > Service Manual > Advanced Troubleshooting > System Lights,

http://support.dell.com/support/edocs/systems/dim3100/en/sm/adtshoot.htm#wp1124612

"Power Light - Blinking yellow - A power supply or system board {Motherboard} failure has occurred"

Dell Dimension 3100 desktop computer Service Manual, (Free from Dell Support),

http://support.dell.com/support/edocs/systems/dim3100/en/sm/index.htm

Click on Removing and Installing Parts > Power Supply

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

Jul 20, 2011 | Dell Dimension 3100 PC Desktop

1 Answer

Friends computer just quit. Replaced power supply. No pwr up


Did you not wear an antistatic band? If not, you have killed your PC.

May 05, 2010 | Dell XPS 410 PC Desktop

1 Answer

Green LED on Dell Inspiron Desktop 530 - all OK?


Yes, on most desk top the green light in the back tells you that you have power to the cpu. Even though the unit is off it is telling you that the current supply is still there. This is a good feature if you move your unit as soon as you plug it in you know if the outlet is on or not.

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It sounds like the power supply went.
Take it to your local computer repair shop for repairs.
Good Luck.

Mar 13, 2009 | Dell Dimension 2400 PC Desktop

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