Toshiba Satellite M35X model is known for it’s power connector problem. This issue has been covered on this blog a few times before in the following articles.

Toshiba Satellite M35X and Satellite A75 power jack and battery charge problem

Failed power jack workaround (guide for a Satellite A75 notebook similar to Satellite M35X)

Here’s another well written and documented guide submitted by Stephen Macuch. Thank you Stephen for the great pictures and very detailed instructions.

This is a view of the laptop power connector before the repair:

Power connector before repair

Inside the yellow circle is the main power connection from the connector to the board – note that you can see a dark circle completely around it, indicating that there is no solid metal connection.

Also note that it looks somewhat ‘burnt’ – this is indicative of sparking taking place. This connection carries 3 amps of current. The current then passes through the component labeled PF1 ( literally ‘Power Fuse 1’). It then is supposed to connect to this side of the part circled in red (‘PL1’) – but notice that flexing of the board as the connector was wiggled caused a crack you can see running horizontally under this end of this part.

Same view, after the repair:

Same view after repair

The green coating covering the metal leading up to the power connector was scraped off down to the bare copper of the board, in three places – the center pin, circled in yellow here, and the connector pins on both sides (see below). All were resoldered – on the top side of the board first, then touched up on the bottom (which is not where the primary electrical contact is made). The new broader, smoothly-tapered connection will be both physically stronger, and a better electrical connection.

Inside the red circle, you can see this was done for other part (PL1), as well.

Bottom view of connector, before the repair:

Bottom view of connector before repair

Again note that inside the circled areas, you can see dark circles where there should be solid metal, indicating that the original physical connection has been broken, and the parts are only transferring power due to the fact that they are touching . In fact, the only thing even holding the connector to the board is the connection in the bottom middle (between the two lower yellow circles) and it has a crack in it, as well.

Notice, also, the dried flux residue, indicating that this bottom-side soldering was done entirely, or touched up, by hand – and not cleaned afterwards.

The actual metal that conducts the power is actually of the top side of the board, where the connector is mounted, but the fact that the solder that flowed through mounting holes has cracked indicates is was not properly soldered in the first place.

As you can see in the two views below, all solder joints between the connector and the top side copper on the board now look much better. Increasing the size and coverage of the solder joints to the metal sides of the connector will make its mounting to the board physically much stronger as well, and better able to resist any side-to-side or up-and-down forces.

Power connector soldered

Power connector top view

Inside the red circles, you can see that both sides of that part PL1 have been well resoldered.

This bottom view of the board after the repair shows good flow of solder through to the bottom side at the time the joints were resoldered.

Connector resoldered bottom view

Here’s another common problem with this model:

Laptop locks up, freezes up or reboots when you touch the speakers

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64 Comments

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  1. 34
    Brian Says:

    I am wondering what the part number pf1 is so I can buy a new one for this laptop m35x-s161. I got it used and it clearly has a problem where it blew out or something also the power jack looks like someone tried to fix it but did a horrible job. If this doesn’t fix the boot up, which wouldn’t surprise me, then what is the next possible cause? I read that the speakers need to have a good ground where is that exactly that is being mentioned?

  2. 33
    Virginie Ansanay Says:

    Thanks a lot for your very helpful guide (good pictures !). It helped me a lot to disassemble my Toshiba MX30 and to fix the problem of battery charging and power connectivity.

  3. 32
    Ivan Says:

    Hello there.My laptop is toshiba m35x like this gray one.I have problem with recharging the batery.Windows tell that the batery is into computer but the computer doesnt charge it.When i restart the computer the LED for battery lights for about 4-5 sec and then stops.I flashed the bios but didnt work.Any suggestions ?

  4. 31
    seanjim78 Says:

    just to say thx, first time i ever took a computer apart,
    apart from surfing the web thats all i know about computers.

    info here was what i needed to confirm what went wrong thx again

  5. 30
    cj2600 Says:

    Mohammed,
    I assume you are asking about a Satellite M35X laptop.
    1. You’ll have to test the power adapter and make sure the voltage output is correct.
    2. Wiggle the power plug inside the jack. If the power LED flickers when you wiggling the power jack, most likely the power jack has to be resoldered or replaced.
    3. If the power jack is not loose and the power LED will not light up or flicker at all, there could be a problem with the motherboard.

  6. 29
    mohammed ali Says:

    my toshiba laptop not working .same dead.not com light and like this one technician tell me mother bord problem please give me a best respond.

  7. 28
    LAURA Says:

    I HAVE A PROBLEM WITH MY TOSHIBA SATELLITE A135-S2356 IT SEEMS THAT THE FAN IT WORKS AS ANOTHER PROBLEM OF TOSHIBA YOU MENTION NO IMAGE IN LCD SOMETIMES THE LIGHT SEEMS TO WORK AND AFTER THAT IT’S DEAD, I TOOK THE BATTERY, HARD DRIVE, MEMORIES BUT THE READING DISK CAN NOT OPEN, I PUT A NORTON INSIDE TO SEE IF IT WAS A VIRUS BUT IT GOT STUCK SO I CAN NOT TAKE THE DISK OUT ANY MORE i’M AFRAID TO OPEN THE WHOLE LAPTOP, SO WHAT YOU RECOMEND? IT WILL COST ME A LOT TO REPAIRT IT?
    THANK YOU.
    LAURA.

  8. 27
    Cornelius Johnson Says:

    Where exactly do you run the wire from the positive pin? The sleeve came up when the dc jack was pulled off? From veiwing the diagrams and the reading you said to run it from the top to the bottom.

  9. 26
    Sid Sandback Says:

    Hi.
    I have a Satellite A70 and the Power Jack needs to be soldered as described, but there is one screw that I can’t figure how it comes out to take the laptop apart. It is buried in the assembly and seems to be almost impossible to take apart. Can someone help me on the procedures to take apart the A70?
    Thanks

  10. 25
    cj2600 Says:

    Ariel,

    Do you know how to get that fuse? What are the specs?

    I don’t know the specs. Take a closer look at the fuse. Maybe it has value written on it.

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