Question about HP Compaq 6720s PC Notebook

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Hp 6720s turns on and then goes off

I have hp compaq 6720s laptop the problem is that when i turn it on the fun runs for a while and then it stops won't come on please help

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Hello. It sounds like either...

1. Your power adapter is damaged/not working. Look and see if a LED is illuminating on the power adapter. If it is chances are it is working fine and the problem may lie on your laptop. If not replace it. The easiest way to tell if your power adapter is bad is to go out to Wal-Mart or your local technology store and purchase one of their universal power adapters. They are expensive but you can buy it, try it, and return it if it does not solve the problem. If you are sure that your hp 6720s charger is malfunction, you may purchase a new one:


2. The DC pin on your laptop is bent/broken/loose. Look at where your power adapter plugs in on your laptop. Get a paper clip, bend it out to make a long paper clip and slightly push its tip on the pin inside your laptop. If the pin moves chances are either the DC pin needs to be soldered down or needs to be replaced. The part is usually cheap around $10 but the labor can cost more than $50.

Posted on Jan 24, 2013

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Ha I like that! "The fun runs for a while and then it stops"

Well we DON'T want that David, lol!

I suggest your laptop is dirty inside. If it has never been cleaned on the inside to your knowledge, it is.

Air is used to cool the hardware components inside the laptop.
The cooling system consists of a;
A) Cooling Tube
B) Heatsink
C) Fan Assembly

The Cooling Tube is a slightly flattened copper tube, sealed on both ends, and filled with Nitrogen.
It has a small flat plate attached to it, that sits on top of the Processor.
There is another small metal plate that sits on the graphics chipset.

[The Processor and graphics chipset are the two hardware components, that give off the most heat in a computer ]

The Heatsink is a thin strip of metal, that has Tall, Thin fins that protrude from it.
In a laptop it is usually rectangular shaped.

The Fan Assembly is a small multi-bladed fan, that is encased in a surrounding cage. (Shroud) Shroud is usually D-shaped.
The flat part of the D is the exhaust opening for the fan.
The fan draws air up in the middle of it, and from the bottom of the laptop.

The metal plates that sit on top of the Processor, and graphics chipset, absorb heat from them.
The Cooling Tube absorbs the heat from the two metal plates, and the Cooling Tube then transfers the heat up to the Heatsink.

The Heatsink absorbs the heat, then radiates it away with it's Tall, Thin fins.
The air flow from the Fan Assembly, helps carry heat away from the fins of the Heatsink.

HP Compaq 6730s which has a similar cooling system,

Scroll down to Step 12 photo.
Here you see a TOP view of the D-shaped fan shroud, and the Heatsink is to the Left.

Scroll down to the last photo on the page.
The rectangular finned Heatsink is to the Right.
You also see the curved copper looking Cooling Tube, and where it states - Heatsink - is the small metal plates.

(That sit on the Processor, and graphics chipset)

A look at a laptop that is dirty inside, using a Dell XPS M1710 for an example,

When the cooling system gets clogged with 'Gunk', the laptop components inside overheat.
[ Gunk = Dirt, dust, hair, carpet deodorizer, lint, food crumbs, name it ]

When a Processor overheats it turns off.
This is a fail safe feature built-in.
Keeps the Processor from burning up. (Sometimes literally!)

Also there is a thermal compound used.
Thermal Paste in-between the Processor, and it's Cooling Tube metal plate;
Thermal Pad in-between the graphics chipset, and it's Cooling Tube metal plate.

[A Thermal Pad is a material that is impregnated with Thermal Paste]

Thermal Paste can dry up over time, and the constant heat inside the laptop. (Thermal Paste in Thermal Pad also dries up)

It then looses it's thermal conductivity properties.

The top of a Processor, and the bottom of it's matching small Cooling Tube metal plate, is not perfectly smooth.
Same with the top of a graphics chipset, and it's Cooling Tube metal plate.

A magnified view would detail, 'Hills, Valleys, and Pitholes'.
Thermal Paste fills these imperfections, and is an Excellent conductor of heat.

Do you wish to disassemble, and clean; and also replace the Thermal Paste, and Thermal Pad?
Post back in a Comment.

HP Support has a free Service Manual, and I can guide you step by step.

(I'll show you what manual to download, and how)

Post back in a Comment.

Posted on Jan 21, 2013


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You may have to enable Bluetooth along with other, less common ports since having it turned on by default may incur a small penalty in battery life. En- and dis-able functions are in the BIOS setup.

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SOURCE: Compaq 6720s - No DVD drive and will not open

Have you replaced this DVDdrive with a working one and does this work if this works you will no that this si a hardware issue. are you using windows vista or windows xp

Posted on May 04, 2009

  • 65 Answers

SOURCE: No sounds within my HP Compaq 6720s Laptop

go to find the driver for the audio sound

Posted on May 31, 2009

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SOURCE: Hello, My HP Compaq 6720s is turned off and

When you say turning on and off all the time until I disconnect the charger, IS the charger running the machine and then after so long cutting out? you leave it and it works , if so its overheating

Machine will need fan and all ducts cleaning and most likely replace arctic silver on psu

IF on the other hand its not running more likely the charger is not powering the machine or charging battery in which case you will need new charger

hope this helps get back to me if you need more help

Posted on Jun 10, 2009

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SOURCE: display problem for hp compaq 6720s

OS is corrupt

Posted on Aug 11, 2009

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