P50-B-10V no power on and spark

Discussion in 'Toshiba' started by johnyb98, Sep 19, 2018.

  1. johnyb98

    johnyb98 Notebook Enthusiast

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    TOSHIBA P50-B-10V not powering on. And no light was light up. I tried this, that I found as a solution on the web for many users:

    1. Disconnect laptop from power cord
    2. Take out battery
    3. Hold power button for 30 seconds
    4. Put battery back
    5. Connect to power cord
    6. You can see that the orange light is on
    7. Press power button to boot up laptop

    Nothing happened. I tried this for about 7-8 times with no luck. No lights were on. I think that motherboard is dead.

    a. What is your opinion about all that?

    And, here we go unfortunately to the other very bad! Also, while trying to make the steps above for another time, with power cord connected (forgot to disconnect), and battery in, I delved into the tiny battery cords in order to disconnect battery connector from its plug on the motherboard. It is a tiny and difficult job for specific notebook, as they have manufactured the connection of the battery to the motherboard. I delved with a plastic letter opener (not exactly plastic, something between plastic and wooden to say? ), and, unfortunately, suddenly letter opener came in touch with motherboard with power cord being connected. A spark then appeared!! Spark that I have never seen before, although I have disassembled many notebooks. What about this spark? Do you think this damaged mobo? My opinion is that, since it did not power on from the beginning (before steps I describe above), motherboard was dead. Your opinion about all that?

    Thank you for your time !
     
  2. epguy3

    epguy3 Notebook Consultant

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    take your Toshiba to the nearest laptop repair shop and have the pros replace the damaged board
     
  3. johnyb98

    johnyb98 Notebook Enthusiast

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    First of all, thank you for the reply. I have no difficulty in completely disassembling parts, in order to replace by myself a new ordered motherboard. The only matter is to be 100% sure that the only part that needs replacement is only mobo and no other part. As not being an electrician, and from what I have read above, is there a way to make sure of that? Do you believe that mobo is the only part that needs replacement?
     
    Last edited: Oct 17, 2018
  4. epguy3

    epguy3 Notebook Consultant

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    again, it's best to let the professionals at laptop repair shops handle replacing the motherboard unless you are 100% confident in fixing your own Toshiba laptop

    let me know if the new motherboard worked though
     
  5. johnyb98

    johnyb98 Notebook Enthusiast

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    I would like to replace the motherboard by my self because this is something I can do. I do not want to take the laptop to a repair shop. The matter is if it's ok to buy only a new motherboard. If it's all repair part needed. e.g. it will not need another hdd, or another ram module for example. With the buy and replacement of only the motherboard, everything will be ok? That is the matter for me. That is what I do not know.
     
  6. senso

    senso Notebook Evangelist

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    Without a working mobo you can't know if the RAM or anything else was damaged.

    But I guess that the input/charging circuitry is all burned up, the Toshiba P50/L50 mobos like to do that, near the battery connector, there is a lot of 8 pin MOSFET's, plug your charger cable and touch those 8 pins components, if they are hot/burning its a dead mobo, never seen on kill anything else, at most your battery is near end of life, as has been stressing those components more and they burned up, so you might want to replace the battery.
     
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  7. johnyb98

    johnyb98 Notebook Enthusiast

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    Nice explanation and knowledge. According to your experience (and according to this explanation), do you believe that, in a great percentage, a end-to-life battery may have caused this damage? Or battery has nothing to do with all that? Asking for just some more knowledge.
     
  8. senso

    senso Notebook Evangelist

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    If you battery was already at end of life(as in lasting less than 15 minutes), it surely aided to damage the motherboard, if it was still lasting over 45-50 minutes, its just another board that didn't stand the test of times.

    It was the P50/L50 models that put the last nail in the consumer Toshiba laptops in Europe, so many RMA's and Toshiba declining responsibilities got them fined and re-sellers dropped them because they where too much of an hassle.

    I have repaired dozens of those mobos, some can be brought to life, but its a 10% chance or less, the rest, used mobos from ebay was the solution.
     
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  9. johnyb98

    johnyb98 Notebook Enthusiast

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    It is a great and helpful information you gave me. I really appreciate it ! Thank you a lot !!
     
  10. epguy3

    epguy3 Notebook Consultant

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    A program from NirSoft called BatteryInfoView can check the health of your laptop battery

    buy a Toshiba brand battery for your P50-B-10V laptop, not a "cheap compatible" one as there are some cheap knockoffs out there that can damage the laptop motherboard.
     
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