Toshiba Satellite model M35X power connector fix

posted in: DC jack | 64

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

64 Responses

  1. @ Patrick Mc intyre,

    Not sure what’s going on but I would run test on the hard drive. Maybe the hard drive has some bad sectors.
    You can download HDTune (free hard drive testing utility) and run Error Scan. Run full test, not the quick one. If you see errors, probably it’s time to replace the hard drive.

  2. Patrick Mc intyre

    I have a toshiba satellite desktop when I turn it on it tells me I have a bad pool header, when I put my password in it says welcome and then the desktop comes on I click aol 9.1 and it says windows has recovered from an unexpected shutdown, window can check online for a solution to the problem the next time you go online I hit check later and it says a problem has been detected and then it says window error recovery it asks if I want to start windows normally and then it goes back to asking my password I put it in and once again it brings my right back to the desk top, do you have any idea what is going on

  3. Can somebody please tell me what part PL1 actually is because mine is burnt and neither it or the other PL parts have any identifying marks

  4. @ kamal,

    It’s not memory, it’s the hard drive you are talking about.
    Here’s the best course of action:
    1. Purchase a larger hard drive and install it into the laptop.
    2. Run recovery discs to reinstall OS back to factory defaults.
    3. Purchase an external USB enclosure for the old hard drive (probably $10-15). Install old hard drive into the enclosure.
    4. Connect enclosure to the laptop and transfer personal data to the new drive.

  5. hiya i have got toshiba satellite pro l4o and it is 3 years old, it has got 80gb memory which is almost full and it is running so slow, it stops responding in normal mode so i always have to use it in safe mode. can u please tell me some solution, im just so depressed.


  6. repairman

    On a M35X-S114 PSA72U-3HC00U power socket, the repair advice here and elsewhere conflicts with my experience. Initially I re-soldered the rear +ve connector above and below the board but this caused a short. Seeing nothing wrong, I removed the socket, cleaned up the area and connected wires to the top side to get things working again. Two days later when I fitted a new power socket the same thing, sparks from a short. Surprisingly I had to completely remove any solder from around the rear +ve connector on the underside of the board. It looks as if it should not make contact underneath. I then put a small amount of epoxy at the rear of the socket to help fix the socket.

  7. Reisha,

    First of all, test the AC adapter with a voltmeter. It’s possible your AC adapter is dead and the battery has no charge.
    Replacing the adapter might fix the issue.

  8. my laptop has been shut down for a month, i am now trying to turm it on but its not coming on at all, even though when i try turning it on, i only have it a month now, its not even taking charge. lights not coming on, what can i do

  9. Johan,

    Are you using original factory adapter or it’s a third party replacement adapter?
    What if you remove the battery, plug the AC adapter and try turning it on (with the battery removed)?

  10. i have toshiba satellite A205-S7466
    my notebook turnd on but no disply if my charger plug. but if my charger unplug, my notebook turnd on and disply normal..

    help me please…?

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