Toshiba Satellite A75 failed power jack workaround

posted in: DC jack, Laptop hacks, Toshiba Problems | 412

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.


412 Responses

  1. stormand

    hi i see your diagram in picture about connecting wire blue and black,white going to power jack.

    can i use regular wire black and white or what should i used wiring what kind of specification do i need ?

  2. Performed the fix above (much thanks!) on Toshiba (p35-s609)
    Now plug in and battery charges, turn on and Ok but runs off of battery. Remove battery and plug in no lights, no turn on?
    Confused?

  3. Johnnie

    IT WORKED!!! I did the Radio Shack version and it worked! The best part is that the Toshiba was given to me! These dismantling instructions were perfect

    Thanks to you guys I have a working laptop!

    One thing I would add is instead of the barrel keychain tether, I cut a couple of inches of a phone cord with the jack and put it in the same place with tape and plug the jack in the phone modem hole… I don’t use the modem anyhow, so it just keeps the cord from being yanked and ruing my new fancy jack. Great help guys thanks.

  4. Bradyn

    Hi,

    I have a HP Pavilion ZV5000, and my power cord needs to be resodered, but I want to try this instead.

    So, what wires do you need to buy?

  5. Excellent advice.
    You don’t need external wiring.
    Buy new PC power jack and replace it. It cost only 10 dollars. (Computer repair shop asked $500)
    It works.
    Thanks.

  6. cj2600

    Michael,

    My laptop is A70 type and now that I’ve removed the jack to install the wiring for the work around, the + and – positions on the mother board are shorted when tested with a meter.

    Take a closer look at the contacts on the motherboard, maybe even use a magnifying glass. It’s possible that you’ve created a solder bridge between + and – contacts while removing the power jack.

  7. cj2600

    Robert,

    Will this work on a Toshiba satellite A30? My jack is not loose but the pin inside the jack broke off inside the Power adapter.

    Yes, it should work on a Satellite A30 laptop too. The power jack on this model is similar to A75.

  8. Steve

    Hi, Was wondering if anyone could help me with some information. What and where should the pos+ and neg- continuity readings be? When I checked them aganst themselves I get a pos+ reading which cannot be right. I must have touched or soldered something which is connecting the pos+ and neg- of the power jack together somewhere, please help me with some knowledge, a diagram, or something, Please. Thank you, Thank you

  9. Michael

    My laptop is A70 type and now that I’ve removed the jack to install the wiring for the work around, the + and – positions on the mother board are shorted when tested with a meter. Any suggestions for this problem.

    Mike

  10. Robert

    Will this work on a Toshiba satellite A30? My jack is not loose but the pin inside the jack broke off inside the Power adapter. So I need to replace the jack regardless. I was thinking if silver soldering the adapter to the jack. Will this work?

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