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My toshiba l40-14n won't charge and will only stay on for about 2 mins when connected to power supply: help?

My laptop won't turn on most of the time. the screen comes on sometimes but loads up a fresh screen as if it's a new computer with none of the saved files. even though it's connected to the mains power supply it still barely stays on for a few minutes which isn't really enough for me to diagnose the problem. I've tried other cables but that doesn't seem to be the problem. I thought possibly it may be a fault with the battery? can anyone help ?

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  • Computers & ... Master
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There are only three parts from the Toshiba laptop that could be wrong:
1. Power Supply/Charger
2. Damage battery.
3. Electrical input port.
First, troubleshoot the charger, you can try it with another Toshiba laptop of the same model, if it shows that is charging, then then troubleshoot the battery.
To TS the battery, just get a battery from a friend, or if you can go to a store where they sell batteries, take the laptop with you and let them know that you want to test it first.
If the battery is not the problem, then you have a faulty electrical input port.
I had a Toshiba Satellite, also, I'm I.T.

Posted on Jun 26, 2017

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Posted on Jan 02, 2017

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SOURCE: Satellite A100-166 PSAA9E does not charge the battery

Your power controll circuit on the main board is bad, you might need to change that or the entire board itself.. If you can get a technician just to repair the power controll circuit you should be fine. most ppl dont do that cause its difficult. Normally your entire main board is replaced. To fix that i will need to see the board but thats difficult since i am sure you dont live anywhere close to trinidad but i am sure someone close to you will be able to repair it, or your can download your service manual for your laptop and attempt to repair it your self.

Posted on Dec 31, 2007

The_PhoeniX
  • 156 Answers

SOURCE: Laptop won't stay on

it might as well be a internal problem related to power or loose contacts with RAM or the power chords internally.
Better to go to the technician in this case.
Your first Battery would have been fine too..

Posted on Apr 12, 2008

djbr1ck
  • 158 Answers

SOURCE: E system 1212 Laptop won't switch on. Power

Laptops are so integrated that usually a system failure that involves power issues such as in your case where you cant get it turn on with anything on the screen mean the mainboard (motherboard) is damaged. This usually leads to buying a new laptop or paying for the board to be replaced which usually costs as much as the laptop.

Posted on May 12, 2011

meinverstand
  • 181 Answers

SOURCE: I have Samsung NP-R505H laptop. My laptop won't

You say it isn't charging, but will it run off of AC power? If it isn't getting *ANY* AC power, then it might be the female end of the power jack on the laptop. If it will run on AC, the culprit is likely to be a battery that needs replaced.

Posted on May 13, 2011

SOURCE: Not charging Acer Aspire 5732z, now won't turn on!

If it does not work with the Charger while the battery is out then I would say either your charger is bad, the dc power jack where the charger plugs into the laptop is bad or you've got motherboard issues. Does the charger have a light on it to indicate that it is on when plugged in the wall? Do you see any lights when you plug the charger into the laptop?

Take an ink pen and see if the little pin inside the computer where the charger plugs is loose and moves a bit. If so that is probably your problem. If the pin is tight and the charger works, then you've got motherboard issues.

Posted on Mar 29, 2012

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Problem with Toshiba laptop


It stays on with Battery? Has the AC jack been damaged due to pulling on the cord while plugged in? Have you tried another cord/charger with the EXACT same power specs? Does the cord/charger charge the Battery? Charge LED lights? It sounds like a Graphics Adapter? If you connect to a external monitor is it the same. Your question/statement indicates multiple issues. 1 , Power, 2, Graphics. Can you clarify "color blank"?

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If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced. Rechargeable batteries will fail if stored in a discharged state for long periods.

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It won't ever be a 'software' issue....it will be either a :

Adapter/Charger issue (Have it tested by local PC repair shop.)
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OR

Laptop power connector issue. (expensive repair.)

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