A bad connection between DC-IN power jack on the system board and the system board is a very common problem with Toshiba Satellite M35X and Toshiba Satellite A70/A75 notebooks. If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it’s still under warranty, it would be fixed at no charge to you.

Problem symptoms:

  1. Laptop randomly shuts down without any warning.
  2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
  3. The battery will not get charged.
  4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

To fix the problem, you have to take your laptop apart, remove the system board to resoleder or replace the DC-IN jack.

Take a closer look at the power jack on the system board with a magnifying glass. In most cases you get the power problem because of a bad connection between the DC jack and the system board, you’ll see a crack between the DC jack connector and the system board.

Here is an example of Toshiba Satellite M35X power jack. The crack occurs between the DC jack pin and the system board.

Toshiba Satellite M35X DC in jack

Resolder Satellite M35X DC jack on the system board

In some cases the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite M35X and Toshiba Satellite A70/A75 laptops on eBay. Search for DC jack M35X or DC jack A75.

How to resolder power jack yourself.

UPDATE:

Sometimes, after you replace the jack, you can see that the system board doesn’t get power at all. The battery will not charge and the power LED will not light when you plug in the AC adapter. So, here’s a possible explanation.
When a connection between the positive pin and the motherboard breaks (cracks), the power jack gets loose. You can feel it when you plug in the adapter plug. A loose power jack can damage the trace inside the hole in the system board. Take a look at the picture.

Laptop Power Jack

As you see, the positive pin goes through the hole in the system board and you solder it on the top side. Right? What if the trace between the top side and the bottom side is broken somewhere inside the hole? I’ve seen it before a few times. In this case everything looks nice and clean on the top side. When you plug in the AC adapter, you get normal voltage readings between “+” and “-“ pins on the top side, but the power DOESN’T go to the motherboard at all, because there is no connection between the top and bottom sides. Test with a multimeter if there is a connection between the top and the bottom.
If the trace inside the hole is broken you still can fix it. You can run a wire to connect the top and the bottom sides. Be careful not to short something on the board.

Update:

Here’s another solution to fix the power jack problem, it shows how to relocate the power jack outside the laptop base. Check it out here: Toshiba Satellite A75 failed power jack workaround.

When you repair a loose power jack, it’s a good idea to check the jack on both sides of the motherboard. When you remove the top cover from a Toshiba Satellite A70/A75 laptop you can see only points where the jack is soldered to the motherboard as it shown on the second picture in this post, but you cannot see the jack itself as it shown on the first picture.
Removing the motherboard from Satellite A70/A75 laptop is a good idea because the jack itself might has a broken “+” pin, as it shown on the picture below. If the “+” broke off the base, you’ll have to replace the jack.
Power jack has a broken pin

 

UPDATE:

Today I received another well written and well documented guide about fixing Toshiba Satellite M35X power connector issue. This guide was submitted by Stephen Macuch. Thank you Stephen for great pictures and detailed instructions.

Support this site.

 

686 Comments

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  1. 106
    Polina Says:

    Hey everybody,
    Here is an update to my comment # 111
    I took my laptop to an authorized repair shop and they replace the mother board under “warranty extension”. Please note that I DO NOT have extended warranty on this laptop and the 1yr original warranty has expired in december 2005. They told me that Toshiba extended original 1 yr. warranty on some defects that apparently were happening too often, and the repair fixed my defect under this extension, so I did not have to pay anything. They also told me that the power jack problem that I had last year (see comment 111) is covered by this warranty extension.

    To comment 112:
    Hi, Patrick, my laptop is M35X-S149, and the problem was MB, but they repleced it under warranty extension. I did not put in hibernation mode, because for some reason hibernation stopped working properly some time ago. Toshiba customer service told me that it can be a software prob., and warrnsty doesn’t cover it, but they are not sure, so they suggested me to reinstall the system and see what happens. I did not reinstall the system (I’d have to kill a whole working day on it) but simply turned the hibernation off.

  2. 105
    cj2600 Says:

    Kiet,
    If you don’t know how to solder, then I wouldn’t recommend doing it yourself. I can damage the system board and it would cost a lot of money to replace it. Take it to a repair shop.

  3. 104
    Kiet Says:

    Hi cj2600,

    But how do u re-solder the jack though? I have a satellite A75 and the power jack is having problem. i can of course buy a new jack from ebay, but i just dont know how to do it…
    Thanks.

  4. 103
    cj2600 Says:

    Paul,
    I haven’t created a complete disassembly guide for this model yet, but I think you can handle it yourself. You’re almost there.
    Now you have to do next:
    - remove the keyboard securing strip (take a look at other guides)
    - remove 2 keyboard screws, lift up the keyboard and disconnect from the system board
    - disconnect the video cable, pull the wireless antenna cables
    - remove covers from both hinges and remove screws from the hinges
    - remove the display assembly
    - now you have to remove the top cover assembly. Remove 4 screws located on the metal plate and 1 screw that was hidden by the display assembly (you’ll see what I’m talking about)
    - disconnect all cables
    - remove the top cover

    Now you have an access to the motherboard and you have to remove it in order to fix the jack. It should be straight forward. Read through other disassembly guide to get an idea. The power jack is a part of the system board, so you’ll have to find a new one and re-solder it.

  5. 102
    Paul Says:

    I believe I’m having the power jack issue with my Toshiba Satellite A35-S159. Does anyone have a link to the Maintenance Manual for this laptop. I haven’t been able to find any links on how to break this one down completely. I figured out how to break it down part of the way. I was able to remove the battery, the DVD player, and the hard drive. I also removed all screws on the bottom of the laptop, the two P8 screws on the rear near the hinges, the two screws underneath the DVD player, and the two screws underneath the battery. Do I need to remove the screen and unconnect that as well? If so, anyone have any instructions to get to the power jack. I’m sure it’s busted as wiggling causes the power light to go in and out. I’m also having problems charging. I bought a new battery to rule that out, but I’m still having the same charging problems.

    Thanks

  6. 101
    Nathan Says:

    Mine’s doing this, too … but it’s an Acer Travelmate 2700. Apparently this is a very common problem in my model, which sucks a great deal. I get random shut-downs, and what’s even weirder is sometimes when i’m using it, if the AC plug comes unattached for whatever reason, it switches to battery, like normal. When I re-plugin the adapter, it stays on battery without switching back, until I shut down the laptop. The moment it shuts down, the AC adapter starts charging the battery again. Bloody frustrating!

  7. 100
    Kiet Says:

    Hi,

    Now I have disassembled my A75 laptop. And i think that the power jack is indeed cracked. So I am gonna get a new jack. but can u provide the instructions (plus pictures would be great) on how to take the old jack out and put the new one in??? Thanks a lot.

  8. 99
    patrick Says:

    Hi Polina just yesterday i turned my computer on and the same thing that your computer is going through mine is going through too. Do you have a m35x-s109 model? Did you put into hibernation mode the last time you used your laptop? As of right now im still investigating but i have three possible solutions one is the cmos, the other is the dc jack ,and the last is the motherboard. I hope that the last isnt the problem because i dont have $400 for a motherboard

  9. 98
    Polina Says:

    Hi, I have similar problem to Peter’s (with the same model), namely, I first had the problem with power supply when my laptop was 6 month old. The battery would not charge, and if you wiggle the plug in the socket then it would, so I had to prop it up. Then they replaced the motherboard under warranty and the upper cover which was manufacturer’s recall. Yesterday here’s what happened: I turned it on and the fan went on and the blue light, but… the screen is dark and the hard drive makes no sound whatsoever, which is unusual. Usually you can hear it turning as windows load. My CD-ROM does not open either unless I poke with a pencil into the small hole, that is provided specifically for this purpose to open it if it can’t be opened normally. My laptop is out of warranty now and the repair shop said it’s going to cost 300-400$ to replace the MB, but I think it may crash again soon. Does anyone know if there were any recalls on this model because of this problem?
    Thank you :)

  10. 97
    GMoney Says:

    cj2600, Peter:

    I’m in the same exact boat as Peter … I followed the directions posted here and have the same results.

    cj2600 your idea about trying while disassembled is a good one because I seem to get better results that way. What I mean is that the laptop boots up good and I can login. However, after a couple of minutes the screen fades to black … It doesn’t appear to shut off it just fades out. The weird part is that I don’t get anything once I assemble the laptop … I press the power button and the blue light and fan comes on and after about 5 – 10 seconds the fan cuts off and nothing appears on the screen. The blue light stays on, but if i move the laptop the blue light goes off.

    I tried attaching the assembled laptop to an external monitor and I still get the same results … My next solution is to just replace the DC-IN jack, however I don’t see how that will help anything now because it appears to be working fine because the battery is charging.

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