Question about Toshiba Satellite A135-S2276 Notebook

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No Power to Toshiba Satellite A135-2276

Started having intermittent problems with charging mechanism. Had to start wiggling the wire to make the AC adapter power the laptop.
Replaced the charger. Seemed slightly better for a while, then worse, then it stopped powering the laptop completely.
Searched for solutions. Found the next most likely culprit to be the input jack. Got a replacement and soldered it into place. Good continuity from positive and negative pins to the motherboard. Reassembled. Still no power.
Disassembled again. Searched motherboard for some sign of a problem, couldn't recognize any. Still no power. Is there a fuse somewhere in this laptop? Can anybody think of a solution?

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2 Answers

Engine will not start

Around this shop we diagnose, and not assume.

1) Test the AC adapter (Charger)
Test with a multimeter set to DC Voltage. You should read VERY close to 19 Volts. (DC)

While testing have an assistant gently wiggle the power cord TO the AC adapter, and the power cable coming FROM the AC adapter.
See if there is an intermittent reading for either one. Indicates a break in the wire/s.

2) AC adapter checks out OK go to the DC Power Jack. This jack is the port on the side of the laptop, that the AC adapter plugs into.

Remove the Battery, see if you can gently wiggle the Center Pin. Use a non-metallic object, or tool.

Also check if the metal shell inside the DC Power Jack moves around.
ANY perceptible movement indicates a problem with the DC Power Jack.

Fortunately, for this model the DC Power Jack is a Power Jack Harness,

The jack portion is a squarish shape with a channel formed around it, and sits in a cutout formed in the outside edge, of the Lower Case.

The harness coming from the jack has a plug on the end.
You just unplug it, and plug a new one back in.

In the photo above, it shows a Toshiba Satellite L305 series Notebook PC, partially disassembled.

On the right side you see the optical drive. Squarish shaped with one corner gone. Has a large white label on it, with a smaller yellow rectangular label.

To the upper right you can barely make out a Red wire. It is connected to the black DC Power Jack.

Looking straight across from it to the Left, you see the other end of the Red wire connected to a white plug.

That's the DC Power Harness, and where it plugs in.
This is the entire article,

(Page 2, and 3 is listed at the top, and bottom of the page, in white.
Page1::Page2::Page3::Find another model )

Posted to show the DC Power Harness, and a pictorial guide that I feel will help get you started.

3) Power Button Board:
Has the Power On switch on it,

If the Power On switch is working, the laptop isn't going to turn on.

See the two wires coming from the board? Black and Red?
Red is the Positive wire, Black is the Negative wire.

Unplug the Power Button Board's plug to the motherboard. There are 2 pins. Carefully touch a small flat tipped screwdriver, (Jewelers is recommended), BRIEFLY to these 2 pins.

Laptop comes on you have a bad Power Button Board.

4) If none of the above is the problem you have a bad power sensor chip.
It's a Power MOSFET.

Soldered to the motherboard, and takes skill to replace.

(It's a power transistor that is used in the circuit.
Need to use Heatsinks on the J type leads when replacing, and good skills for un-soldering/soldering.

But doesn't take a rocket scientist to replace it.
{ Sorry Gort }

This example is used in a LOT of laptops,

Or replace the motherboard.

For additional questions or comments, please post in a Comment.


(Link to free Service Manual to be included in a Comment )

Feb 05, 2012 | Toshiba Satellite L305-S5941 Laptop

1 Answer

My toshiba satellite l35 wont turn on,,,the light blinks then shuts off ,,,thats all it does

You may have a DC connector problem:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.

If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it

May 17, 2011 | Computers & Internet

1 Answer

My toshiba satellite pro doesn't work , even with charger in , it doesn't turn on , its like all the power is gone :o ?

You may have a bad DC connection:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning

If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it

Dec 16, 2010 | Toshiba Satellite A60 Notebook

1 Answer

Intermittent power supply, problems whit the jack, how I can change that? thanks, Ing. Elton Vargas

1) Check to make sure the problem isn't the cable going into the plug, from the AC adapter. (Charger)
A lot of times, where the wires meet the back of the plug, that goes into the laptop DC Power Jack, is bad.
The wires have a break from becoming stretched. Makes an intermittent contact.
Same thing for where the wires meet the charger body.

AC adapter plugged into power, unplugged from laptop, use a multimeter set to the DC voltage scale.
Use the alligator clip attachments for the probe leads, attach the probe lead's to the AC adapter's plug, and wiggle the wire, check for an intermittent break.

2) AC adapter (Charger) unplugged from laptop, Battery removed, see if you can wiggle the center pin of the jack.
You may find the entire DC Power Jack will move a little.

If the center pin does not move, but the entire body of the jack does, the jack may just need to be
resoldered to the motherboard. The solder connections may be cracked.
If the center pin moves, replace the jack.

To replace the DC Power Jack, or repair the solder connections,

1) Remove all power to the laptop. AC adapter and Battery.

2) Observe Anti-Static Precautions:
Buy and wear an ESD wrist strap. (Electro Static Discharge) Connect the alligator clip to a good ground source. I connect mine to the metal frame of an open, empty desktop computer case.
(You don't need an Anti-Static Mat)
The price of an ESD wrist strap is around $3 to $8. Found in a multitude of places.

3) Completely disassemble the laptop down to the bare motherboard in your hand.
No Processor, Heatsink assembly, peripherals, nada.

A) You may wish to take photos, or make a video as you disassemble, for your first time. Also make notes.
After the first laptop the next one becomes easier.
(All of them follow a basic path when disassembling. Toshiba, HP, Acer, Gateway, you name it)

B) Use a multi-container for the various screws. Label each container for the area the screws came out of.
There may be 60 or more screws, and 12 different types of screws. Some look VERY similar to each other, but are NOT. DO NOT mix them up.
You can use a clean egg container in a pinch. Label each egg holder.

C) Take your time, use patience. Practice your soldering, de-soldering skills before working on the Toshiba's DC Power Jack, if you're rusty.
Use Desoldering Braid, and not a Desoldering Tool. (Solder S-ucker) The desoldering braid works MUCH better! (Also known as solder wick)

Pictorial, with details on how to disassemble the Toshiba Satellite A70, or A75 series of laptops,

You can click on each photo to enlarge.
Page 2, and 3 icons are at the bottom.
(You are on Page 1.
Page 1::Page 2::Page 3 )

One source for a Toshiba Satellite A75-S209 DC Power Jack,

Toshiba Satellite A70 series Service Manual, (Free)

Go down to the line that begins with Satellite A10.
Scroll across to A70, and click on it.
This is a PDF file. May take up to 30 seconds before you see the first page.
May take additional time to fully download.
(Took me around 40 seconds before I saw the first page, with a medium speed DSL connection)


Oct 20, 2010 | Toshiba Satellite A75-S209 Notebook

2 Answers

My Toshiba wont turn on. I tried holding the power

Hi there, Your ac adapter is damaged & that's why power does not transfer in your notebook. The capacitor of adapter is burned & that's why the noise started. Thanks & waiting for your feedback.

Feb 19, 2010 | Toshiba Satellite A60 Notebook

1 Answer

Satellite P35-S611 has trouble charging

If you have to wiggle the power cord it is most likely the DC jack on the motherboard. It is usually the center pin in the the jack that breaks the solder point and the small tension band inside the jack housing weakens.

Sep 26, 2009 | Toshiba Satellite P35-S611 Notebook

1 Answer

Tashiba Satellite M35X S161 AC Intermittent Power Problem.

Your model of laptop is typical for the issue of the power plug. The plug can be soldered back on. As far as compatible memory you can call toshiba customer support and they probably could answer that question. there # is 1-800-457-7777

Mar 07, 2009 | Toshiba Satellite M35X-S161 Notebook

1 Answer

Toshiba m115 will not power on

Hi kipdidy23
You have eliminated all that you could with the fualt finding. You will unfoertunetly have to take the notebook in to a repair centre. The charging circuit on the motherboard is blown. Please feel free to search he Repair Service Directory on this site for a repair centre close to you.

Dec 16, 2008 | Toshiba Satellite M115-S1061 Notebook

2 Answers

Toshiba P15 S479 Laptop

I had the same problem. The AC adapter connections on the mother board had to be resoldered.

Nov 04, 2008 | Toshiba Satellite P15-S479 Notebook

1 Answer


sounds like you have an intermittent problem with your AC adaptor or dc input jack. Does the light on the AC adaptor light up when you plug it in? If it does then your dc input jack may be faulty. If the light on the ac adaptor does not light then replace the ac adaptor. Good Luck!

Sep 16, 2007 | Toshiba Satellite M30-S350 Notebook

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