Question about Toshiba Satellite L45-S7419 Notebook

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Battery not charging. Power supply ok - Toshiba Satellite L45-S7419 Notebook

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  • bmord Nov 15, 2009

    Thanks for suggestion power socket fine.After opening laptop casing -19.5v at motherboard, thereafter lost . No volts at battery terminals !!

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Power socket loose connection most likely. Disasemble laptop take out the motherboard and check the conections of the power socket, replace the power socket if needed. You need fine soldering tool.

Posted on Nov 15, 2009

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If the power supply is OK,then clean inlet of tab and jack of supply. Make sure the tab is powered off and the battery is not connected.

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My question is , i have 4 Argus LCM PLUS PATIENT MO NITER AND THE PROBLEM IS DOESN'T WORK IN ALTERNATIVE VOLTAGE,IT IS ONLY WORK BY BATTERY after a weak the battery is low in the display.. PLEAS ADVICE...


There are two supply systems are in your machines. One is for charging the battery, and other is for bypass AC power converted to Dc ; when AC power is present. That is when AC power is present, your machine will work on that power, and charge the battery simoultaneously. When AC power is inturupted, it will automaticaly change over to battery power. But the power consumtion of your machine is high. Therefore battery power will get downed soon. Battery is placed inside the machne only for urgent power faulure use. Not for continous use. Both the power supplies are SMPS [Switched Mode Power Supply] types. We can't prophet the reason for its failure. We are repairing such machens here. Now your machines battery charging circuit is ok. AC power bypass is faulty.
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1 Answer

Charging ok bat power not coming.this mother board was no power & charging.whate can i do.


Try changing out the battery with a new one and see if it charges since the power supply is working because its charging. If a new battery doesn't work then the motherboard is bad and would need to be replaced.

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check that the power supply is the correct one for the laptop, check that the power requirements of the laptop match up with what is being supplied by the power supply.
if the labels match, for Toshiba the usual supply voltage is 15VDC, if the supplied voltage is 1 volt below recommended the battery will not charge.
If all appears correct then check the output voltage with a multimeter it should read 15V (-0.25V +1V).
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It is possible you have two dud batteries. Recharageable batteries have a limited life, they have a finite number of charge and discharge cycles.
With the battery removed and only the power supply connected and the laptop powered up, when you touch the connector on the laptop and the laptop does not shut down then the laptop connector is OK.

If you can verify your new battery is OK the the fault could be the power supply adapter, if may not produce enought current to run and charge the battery. Try charging the battery overnight by turning off the laptop and leaving on the mains t charge. Borrow a mains adapter and test it on your computer.

You can also check the BIOS setting for power management, ie. hibernate, low power shut down etc.


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