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Gateway MX 6440 laptop

I checking a gateway MX 6440 laptop for a friend. It will not power up. I have checked the adapter with a volt meter and it works. I removed the hard drive and tested it in another computer and it works. The battery is new but doesn't seem to charge.

I'm taking a wild guess and saying the motherboard is dead. Does anyone else have any ideas.

The computer was one month out of warranty. When it died it was powered on and then apparently shut down and that was all she wrote.

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Re: Gateway MX 6440 laptop

You may be right about the mboard but also try changing the processor or taking out the processor and try powering on withou the processor. If its the mboard then it could have been because of a power surge and thus the mboards needs to be replaced. let me know how you go. thanks


Posted on Feb 06, 2008

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Gateway id49c notebook power issues

1) Test the AC adapter (Charger) first.

Test with a multimeter.
(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. Checkout aisles of major discount stores, may have them on the rack)

Function knob set to DC Voltage.
(If just a symbol the symbol is a dotted line over a solid line)
If more than one DC Voltage scale set it to the 0 - 50 Volt scale.

Positive (Red) probe lead of multimeter goes to the Center Hole, of the plug end that plugs into the laptop.
Negative (Black) probe lead touches the cylindrical metal shell, on the outside of the plug end.

You should be reading 19 Volts DC.

Also have an assistant gently wiggle the cable from AC adapter to laptop, and power cable to AC adapter (Charger)
Fluctuation in the reading means you have broken wires.

AC adapter checks out OK?

2) DC Power Jack:

The DC Power Jack is the jack on the laptop, that you plug the AC adapter (Charger) into. (DC_IN)

Battery removed, (And AC adapter, 'natch), use a No.2 pencil, and with the eraser, gently see if you can move the Center Pin around.
ANY perceptible movement means damage to the DC Power Jack, and replacement.

3) AC adapter and DC Power Jack checks out?

Problems with the Power MOSFETs used in the power section, on the motherboard, or possibly Ceramic Capacitor failure.
(Multi-Layer Ceramic Capacitor, and they are Surface Mount Devices)

Using the HP Pavilion dv6000 series, and Pavilion dv9000 series of Notebook PC's, as an example,

Looking down at the second photo with the Alpha and Omega Semiconductor - AO4407 - Power MOSFET circled in Yellow, look at the small rectangular shaped object to it's Right. Has a wide dark band on it.

This is a Ceramic Capacitor.
There is one above it of the same size, one above that one, and one to the right of the top one.
If any one of these, or the Power MOSFETs are blistered, blackened, or bubbled, they need to be replaced.

Due to issues that could arise by replacing, and having more components be bad, or go bad; the logical choice by most tech's is to simply replace the motherboard.
(Also puts more dinero in their pockets)

[ Your user name reminds me of Hee-Haw. "If it wasn't for bad luck I wouldn't have any at all." Lol!'s going to get BETTER! ]

For additional questions please post in a Comment.


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1 Answer

Gateway 600yg2

I may not be understanding what you are stating, so bear with me;

1) The Wireless Modem antenna wires are up in the Display Assembly,

In otherwords they should already be there.

2) The 802.11 Mini PCI Card, is a Wireless Module.
It goes in the Mini PCI Compartment, under the Mini PCI Compartment Cover, located on the bottom of the laptop.

It's made by Broadcom,

(Gateway 6002672 part number)

See at the Top right where it states Main, and has a white Side Arrow?
This terminal is where the Black wire (Lead) of the wireless antenna connects to.

The other terminal, AUX, is where the White wire connects to.

Here is the Service Manual, (PDF file form),

Page 13.

REMEMBER, remove ALL power. Remove the AC adapter (Charger), and Battery, before working on the laptop. Also follow Anti-Static Precautions.


Aug 20, 2012 | Gateway Motherboards

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Laptop will power on but not boot up

Hello my friend,
Attempt to enter into the bios(pressing DEL while you booting) and then Load Bios Defaults settings.

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I have a gateway mx 8734 that sometimes will power up into bios and sometimes it will not. I have replaced the hard drive ans upgraded the ram with no response. when I press the power button it tirns the...

try removing the ram and see if it boots up do this with all installed items cards anything you can unplug one @ a time this will help you to narrow down what your problem is .

Jan 08, 2010 | Gateway MX8734 Motherboard - 31PA6MB0090

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Gateway W323-UI1 battery shows charge at 100% but then when unplugged from AC adapter for 10 mins or so it says "critical battery" and if not plugged back into AC adapter right away laptop powers off...

You will need to calibrate the battery. When you boot the laptop, it will say very quickly to enter Setup press F2 (or Delete key) or similar. Do that, you will enter the BIOS. Look for battery calibration and run it. Can take a few hours.

Jun 16, 2009 | Gateway (4000274) Motherboard

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My gateway laptop will start to turn on then power off

Try to power on the laptop after removing the battery.
If this didn't fix it, there might be a defective or failing component in the laptop's power circuitry. This could be checked & fixed by a qualified technician.

Apr 10, 2009 | Gateway (4000068) Motherboard

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is is a desktop or a laptop PC.

if desktop try a different power supply and not battery( UPS) , although the UPS is very important to control increase and decreases in voltage.

Mar 24, 2009 | Gateway Motherboards

1 Answer

Laptop won't turn on

If you know someone who has the same laptop, try testing your battery and adapter on that laptop just to make sure that they are working fine. If not, it might be a motherboard issue and replacing a laptop motherboard would cost a lot.

If you have a geek friend, ask him/her to use the multimeter to check that the power supply is delivering the correct voltage to the motherboard.

If you dont, try to get another opinion from another place to check if they say it's the same problem.

Oct 27, 2008 | Gateway (4000274) Motherboard

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