Question about Gateway Bestec ATX-300-12EB3 305w Power Supply (ATX30012EB3) Power Supply

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DESKTOP WON'T POWER UP

AN LED IS FLASHING ON THE FRONT OF MY COMPAQ PRESARIO DESKTOP.IT IS TO THE LEFT OF THE RESET/POWER BUTTON ON FRONT.ALSO A SMALL LED IS FLASHING IN SYNC ON REAR OF TOWER TO THE TOP LEFT ( FROM THE POWER SUPPLY).COULD IT BE A FUSE OR THE WHOLE POWER SUPPLY ?

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  • colliebud Jan 22, 2009

    I wanted to try a new one before replying. I installed it and it's working perfectly. Thanks for confirming my suspicions.

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  • Master
  • 685 Answers

It is your power supply it needs to be replaced

Posted on Jan 08, 2009

  • Juanita Vega
    Juanita Vega Jan 22, 2009

    i'm glad your computer works now and ty for using fixya

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How to re-wire a Compaq Presario SR2150NX Case power Switch


The plastic front of your desktop computer is the Front Panel.

The area of contact pins on the motherboard, that the wires from the Front Panel go to, is the Front Panel header.

F_PANEL_1

The Front Panel header contains connections for the Power On switch, Power On LED light, HarDDrive activity LED light, and so on.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00864922&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=3339274

(Look at the motherboard photo. The Front Panel header is at the bottom right. Scroll down for the motherboard illustration )

There are 9 contact pins.
4 across the Top row, and 5 across the Bottom row.

The four pins across the Top row are numbered EVEN.

From the Left side going towards the Right side;
Pins 2, 4, 6, and 8. There is NO pin 10, just a blank spot.

The five pins across the Bottom row are numbered ODD.
Pins 1, 3, 5, 7, and 9.

A) Pins 2 and 4 are for the Power On switch

B) Pins 6 and 8 are for the Power On LED

(LED is dim when the computer is on? Switch the wires around )

C) Pins 1 and 3 are for the HarDDrive activity LED

(LED is dim when the harddrive is operating? Switch the wires around)

D) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.

How to know which wires are for the Power On switch, Power On LED, and HDD LED?

Follow the wires into the Front Panel. Remove the Front Panel, and follow them.
(Need guidance removing the Front Panel post in a Comment )

For additional questions please post in a Comment.

Regards,
joecoolvette

May 02, 2012 | HP Compaq Presario SR2150NX PC Desktop

1 Answer

Front panel wiring diagram ie power switch reset switch etc


HP Support > Compaq Presario SR5501F > Motherboard Specifications,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01237538&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=3740354

The motherboard is made by ECS for HP/Compaq
ECS model number is MCP61PM-HM
HP/Compaq's name is Iris 8.

There is no wiring diagram per se to give you.
I'll have to detail the wiring connections step by step for you.
This may be a little lengthy.

On the link above you are looking at a photo of your motherboard.
There is also an illustration available.
I would like you to copy, and save them both.

Using this method you will be able to enlarge them for further clarity, of the connections to the motherboard.

Right-click on the motherboard photo. Left-click on Save Image As, in the list.
In the Save Image window that comes up, you will see the heading File name:
To the right of File name: will be c01237541.

Unless you want to search for c01237541 you may wish to do this:

Put your mouse cursor after the 1 in c01237541.
Left-click twice.
Make one space with your spacebar.

Type Compaq Presario SR5501F Mobo photo.
(Mobo stands for MOtherBOard)

You want this photo to go to your My Pictures folder.
(Windows XP. Different for Vista)
At the top of the Save Image window is the heading - Save in:
In the box to the right you should see - My Pictures

If you do Not you will have to change the destination.

Left-click on the blue down arrow to the right of the box.
In the list, left-click on - My Documents, then left-click on - My Pictures.
Now go to the bottom right of the Save Image window, and left-click on Save.

In the link, scrolling down you will see the heading - Motherboard layout
Left-click on the + sign next to Motherboard layout.
Copy and save it as you did for the motherboard photo.

In the File name: box type - Compaq Presario SR5501F Mobo Illustration.

Now all you have to do is go to your My Pictures folder (Start>My Pictures), and double-click on the photo, or illustration.
Left-click on the Zoom In icon at the bottom of the window to enlarge.
(+ sign in a magnifying glass icon)

Wiring Connections to the Motherboard:

A) Front Panel header: (Panel 1)

The Front Panel, is the plastic front of your computer where the Power On button, HarDDrive LED light, and Power On LED light is located.

The Front Panel header is the connections, or pins, on the motherboard, where the cables (Wires) go to from the Front Panel.

On the motherboard illustration it is marked as Panel 1.
(Down in the bottom right corner)

On your motherboard, Panel 1 (Front Panel header) is Black in color.
As you can see it is a rectangular block, and is placed vertically.
Has 2 columns of pins.
5 in the left column, 4 in the right column.

The Left column is numbered Odd.
Starting at the Top going down, Pins 1, 3, 5, 7, and 9

The Right column is numbered Evenly.
Starting at the top going down, Pins 2, 4, 6, and 8.

Pins 1 and 3 are for the HarDDrive LED light.
(HDD activity LED)
Pin 1 is for the Positive connection ( + )

Pins 5 and 7 are for the Reset switch.
Pin 7 is for the Positive connection. ( + )

Pin 9 is reserved, and may not be used.

Pins 2 and 4 are for the Message LED light. (LED = Light Emitting Diode)
Power On LED light.

Pins 6 and 8 are for the Power On switch.
There is No Pin 10.

If the cables (Wires) are not marked coming from the Front Panel, you will have to remove the Front Panel, and trace where they go.

You will be able to physically see where wires go to the Power On switch, Power On LED light, HarDDrive activity LED

Sep 21, 2011 | HP Compaq d530 SFF PC Desktop

1 Answer

Power button flashing when in the sleep mode


Its not a problem. Every system flash the power LED in sleep mode.

Apr 30, 2011 | HP Compaq Presario SR1575CL (PX808AA) PC...

2 Answers

Compaq Presario SR2150NX doesn't turn on. Front panel green light turns on but nothing else happens (no fans, no boot, no noise, nothing) Please advice


On the back of the Power Supply there should be a Green LED, When you power it on if it is flashing, this means that the Power Supply is dead and you need to replace it.

Apr 14, 2010 | HP Compaq Presario SR2150NX PC Desktop

1 Answer

Power light flashing HP Compaq Presario SR1230NX PC Desktop I powered the unit down; when I tried to powered it up the only reaction is a green led flashing. The led is located in the back close to the...


Sounds like the Power Supply is bad likes its not able to power on itself. Best thing to do, try a different known good power supply and attach it to the motherboard, if you get the same symptom with the machine not powering on then its a bad motherboard. If the machine does power on then you know your original power supply is bad.


May 28, 2009 | HP Compaq Presario SR1230NX (PJ518AA) PC...

1 Answer

Green light flashing after shutting down computer to relocate office.


if its by the power button the led just indicates power after u have removed its source and reconnected it........this is normal nothing to worry about.

Sep 13, 2008 | Compaq Presario 5000 PC Desktop

2 Answers

Compaq Presario SR1000 desktop boot up problem


nothing to do with the ram ... this motherboard sometimes locks, ( dont ask me why) but if you take out the power cord for 5-10 minutes and then press and hold the front power button on the machine (about 10 seconds) it will reset the board. Plug in the power cord and the basic items, sound, video etc ( some usb devices tend to stop it booting to) boot into windows. Then add the rest of your usb devices ..

Mar 23, 2008 | Computers & Internet

1 Answer

Presario 6350CA won't boot


I don't know that I'm going to be a great deal of help, but here is the link to the support site for you Presario:

http://h10025.www1.hp.com/ewfrf/wc/product?product=390426&lc=en&cc=us&dlc=en&lang=en&cc=us

Here's a link to another page on the Compaq site that specifically talks about power supply problems:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&lc=en&cc=us&dlc=en&product=390426&lang=en#N514

They discuss a flashing power led on this site, but I believe they are referring to an led on the power supply itself. Perhaps the led on the keyboard and the led on the power supply are both flashing...

Good luck. I hope this helps.

Dec 22, 2007 | Compaq Presario S6300NX PC Desktop

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