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My compaq presario cq62 wont turn on i bought a new power chord but it still does nothing

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  • Compaq Master
  • 5,660 Answers

Shane, new power cord? Does this mean the old one was bad?

Do I assume you used a multimeter;
1) To test the voltage output of the AC adapter (Charger),

2) And had an assistant gently wiggle the cable TO laptop, and power cord TO AC adapter; to see if there was an intermittent reading on the multimeter?

[The Center Hole on the plug end of the AC adapter cable TO laptop, is the Positive connection. The outer cylindrical metal shell of the plug, is the Negative connection.
You should be reading 18.5 Volts DC.

An economical multimeter can be purchased for as little as $5 to $12. Available in a multitude of stores. An auto parts store is but one example. I have seen them on the checkout aisle racks, of large discount stores.

The Positive (Red) probe lead is inserted into the multimeter, in the Red hole that has DC Voltage next to it. (DCV)
The Negative (Black) probe lead is inserted into the Black hole ( - )

The Function knob is set to DC Voltage. If just a symbol, the symbol is a dotted line over a solid line.
IF there is more than one DC Voltage scale, the Function knob is set to the 0 - 50 Volt scale. { 0 to 50 ]

AC adapter checks OK?
Then check the DC Power Jack.
The DC Power Jack is the jack on the laptop, that the cable from the AC adapter is plugged into. (DC_IN)

AC adapter removed, ('Natch), and Battery.
Use a No.2 pencil, and it's eraser, to see if you can gently move the Center Pin, in the DC Power Jack.
ANY perceptible movement means replacing the DC Power Jack.

However good news. The DC Power Jack is NOT soldered directly to the motherboard.
It is a DC Power Jack that has wires coming from it, and the wires end in a small white plug.
This assembly is called a DC Power Harness,

All you have to do is partially disassemble the laptop, unplug the DC Power Harness plug from the motherboard, and replace,

USE AN ESD wrist strap, and connect it's alligator clip to a good ground source.
I connect to an unpainted surface, of the metal frame of an open, empty desktop computer case.

You can also set a large metal serving plate (Unpainted), on the table you are working on, and connect to it.
Or a large metal knicknack. (Unpainted)

Use a mutli-compartment container for the various screws you will remove.
Label each compartment for the area the screw/s come out of.
SOME screws look VERY similar to other screws.
Advise do NOT mix them up.

(Just so you have it in case you need it for the future, )

HP Support > Compaq Presario CQ62 series of Notebook PC's > Manuals > Service Manual, (Free),

Click on the first file listed -
Compaq Presario CQ62 Notebook PC and HP G62 Notebook PC -
Maintenance and Service Guide

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the above file name it may take up to 30 seconds, before the first page comes up.
(The file is downloading in the background)

AC adapter checks out, DC Power Jack checks out?
Check the Power On switch.

The Power On switch is pressed with the Power On Button.
The Power On switch is part of the Power Board,

This part separates the user from the tech. There are 6 wires in that flat cable. (I believe 6) There are 6 contact pins in the motherboard connector, for those 6 wires. TWO of those contact pins turn the laptop on. A tiny flat tipped Jewelers screwdriver, is used to MOMENTARILY touch the two contact pins.

{The Power On switch is a Momentary Contact Switch }

Laptop comes on you have a bad Power Board.

Laptop does not come on;

One or more Power MOSFETs may be bad, and may include bad Ceramic Capacitors (MLCC) for the Power MOSFETs.
Information using HP Pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's as an example,

Yes, motherboard replacement

For additional questions, or to have me clarify anything I have stated, please post in a Comment.


Posted on Nov 08, 2012


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Posted on Jan 02, 2017

  • 11800 Answers

SOURCE: This is a Compaq Presario

Simple test to determine if it's a hardware or software problem : try to boot in the BIOS. If you can't then it's hardware you should just return it, it's still in the warranty. If you can then Windows is totally corrupted so just reinstall it.

Posted on Dec 19, 2010

  • 1087 Answers

SOURCE: Compaq presario c700 laptop- unable to turn on laptop

U may have a dead board. They average $285 plus labor. A shop should be able to test it on a volt meter see if the power grid is burnt for around $35. then u will know what ur in for. If its a bad board just replace the laptop I wouldnt repair that problem on an older laptop.

Posted on Jun 24, 2010

  • 214 Answers

SOURCE: I bought new laptop Compaq

Is it Booted perfectly and giving the error after login? Please try to update the CD/DVD Driver. You can use chipset CD which comes with your laptop.

Posted on Sep 23, 2010

  • 18 Answers

SOURCE: How do I hook up

Put the HDMI cable into laptop and tv.

Posted on Dec 26, 2010

  • 1140 Answers

SOURCE: needs the display driver for

Try this buddy :



Driver Robot updates:

* Sound card drivers
* Printer drivers
* Video card drivers
* Motherboard drivers
* Webcam drivers
* Wireless drivers
* Bluetooth drivers
* FireWire drivers
* Ethernet drivers
* Windows XP drivers
* Windows Vista drivers
* USB drivers
* Chipset drivers
* AC97 drivers
* DVD drivers
* Router drivers

just install it,scan and download... enjoy...

Posted on Jun 10, 2011

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For additional questions please post in a Comment.

Make all checks out to; The joecoolvette Fund for Having a Good Time


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