Today I received an email from Tony Sakariya who was experiencing a problem with the power jack on his Toshiba Satellite A75 laptop. He’s been able to fix the problem by relocating the power jack outside the laptop case away from the system board.

 

I would like to share with others a tip for repairing their Toshiba A75 laptop for the DC Jack and battery charge problem.

I have a Toshiba A75-S209 for a year now. After the first 3 months it developed the exact same problem. Battery would not charge and I had to twist and turn the power jack to make the connection. Since it was in warranty, I returned it and they repaired and sent it back to me. The problem recurred again after about 4 months and I sent it again and they repaired it and worked fine for 5 more months and it failed. This is a design flaw with Toshiba. Now that I am out of warranty, I decided to repair it myself.

Now here is what I want to share with others. Resoldering the power jack with a new one does solve the problem for a while but it will reoccur. Hence I decided to bring out a wire with the Jack outside. Of course it looks dirty but it is a permanent solution. I am attaching the photo of the repair I did. I got the DC jack from ebay and insulated it with a electrical insulation tape. Now it is working fine, I do the connection and disconnection on the dangling power jack outside the laptop and hence no chance of breaking the soldering outside.

Laptop failed power jack fix

• Coil the pair of wire one round through the ventilation grill before taking it out as shown in the picture above. This is to prevent any external shock or force being directly transmitted to the soldering joints.
• Now we need to connect a new DC Jack to other end of the wire. I purchased the new DC jack from  eBay for $6. Shown in the picture above the white wire is the positive terminal (+) and hence must connect to the inner ring of the DC Jack. Similarly the blue wire being the negative terminal (-) should connect to the outer ring of the DC jack. Refer the picture below on how the wires are soldered to the DC Jack. Be careful not to short the leads as they are very close.

Power Plug Fix

• Now neatly wind a round of insulation tape over the wire and especially on the exposed DC Jack exterior. This will prevent any short-circuit and also give a better appearance.

New Power Jack Assembled

Valued Comments.

Submitted by Binney:

The workaround relocates the jack externally. When I did this, a short occurred between the metal casing on the top cover (the one removed with the guitar pick). This happens if the solder repair is too tall. I covered my repair with electrical insulation tape and that fixed the problem. It took me quite some time to figure out where the short was and would like to save others the headache.

 

Comments #282, 286 submitted by Jake and John:

Size N: DC Power Jack #274-1576 from Radioshack works perfect and looks great. Costs $2.99, easier to solder, snugger fit, 5.5mm O.D. x 2.5mm I.D.

Here are some pictures of the end result of the repair with
the Radio Shack type jack. I added one of those quick release
key holder that I had lying around as a retention holder.

Here is what it looks like unplugged: Power tip unplugged.

Here is what it looks like with the adapter plugged in and
the key holder reattached: Power tip plugged.

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412 Comments

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  1. 52
    cj2600 Says:

    Albert,
    DC jack workaround should be the same for both models A75 and M35X, they both use the same type of the power jack.

  2. 51
    chris Says:

    Ok last night I took it apart yet again. I had my buddy solder from the center pin on the ac plug to the other end of the fuse. That didn’t make a difference. So then I downloaded toshiba power management software and that didn’t seem to make a difference. But, I woke up this morning and my battery is fully charged and my computer is running on ac power. I’m afraid to turn it off now! Dont know if maybe the aftermarket ac adapter I have is not powerful enough to charge the battery and run the laptop at the same time or what….. Actually that wouldn’t matter cause it wouldn’t run with the battery out either last night so who knows. It must have been little elves in my sleep.

  3. 50
    Joe Says:

    Hi Chris looks like i am stuck at the same point as you. I have dismantled my A75 twice and resoldered the connector on both occasions. Second time around i soldered the 3 pins together just incase. All was well till this evening. If i shut down the laptop the battery will charge fully. If i turn it on sometimes it will power via the adapter or the battery but not always. I might try flashing the bios on a full charge and see if that helps fingers crossed. Will let you know what my results are once i have tried it.
    Regards

  4. 49
    chris Says:

    I have the same problem, my A75 will run off battery power but not AC. The battery will charge when the computer is powered down but not while it is on. I can go to the F2 boot option page and it will run without the battery in but as soon as windows starts it goes to battery power. Somewhere I read that it could be a bios problem but I am afraid to flash cause it wont run on ac and I dont want the battery to die in the middle. I have resoldered the power plug twice now and the first time it worked great but this time it wont run on ac?????????????????

  5. 48
    ALBERT Says:

    IS THE DC JACK WORK AROUND THE SAME FOR THE M35X -S329?

  6. 47
    Robb T. Says:

    Waht kind of wire did you use for the Power Jack Workaround

  7. 46
    cj2600 Says:

    Tim,
    Read comments 163 and 166 posted by Bernie here. It looks like you have exactly the same problem. Check if solder points on your motherboard are clean and there is no short of any kind.

  8. 45
    Tim Says:

    i need help! i followed the instructions of disassembly, got down to the board, but couldnt get it out of the case without force. so i left the old plug in and then just soldered the wires to the top of the board as in the picture. got it all back together and now alls i get is beeping from the adapter box. does anyone know what that is? must i take it back apart and remove the old plug? please help

  9. 44
    cj2600 Says:

    Sandra,
    I’ve already mentioned a link to the disassembly guide in the post. OK, I added one more link under the last photo.

  10. 43
    Sandra Says:

    Ok, how do you get the laptop apart to even get to the plug?

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