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Hi i have a Samsung np-r40 and it dosnt charge or get any lights working, it works fine with a full battery so comp is fine but cant get it to charge or come on useing the mains ive brought a newcharger thats working fine ive taken it apart tocheck the dc plug incase that was loose that looks fine so wat else can it be? It was working fine until my old charger over heated and blew so has there been a powersurge and blew something in the motherboard ifso Any ideas so i can replace it? Regards

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If it still works with a battery the computer is fine and the ac power input may be fried. They can be replaced at a cost. I once had a problem like this and found my new ac charger was actually not powerful enough to power the laptop. Check that the old and new ac charger are the same watts amps etc.

Posted on Apr 18, 2015

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Something, a component, in the laptop may have fried the charger. I don't know for sure. You would have to trace the circuit with a multimeter to locate the bad power component.

Posted on Jan 13, 2013

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Geekman
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SOURCE: Samsung NP R70 Laptop won't charge

Most laptops will work with or without the battery and with the power adapter connected.
If the power adapter is OK, just connect it to the laptop's power socket and wriggle this plug. Does the charging LED flash as you wriggle this plug? If so the power socket may have a dry solder joint or it may be faulty. Either way the laptop needs to be dismantled to solder or replace the power socket.

Posted on Jul 21, 2009

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SOURCE: My Toshiba Satellite Pro A200 works fine if I use

It sounds like the connector from the A/C adapter to the motherboard is loose or the inside of the adapter plug that attaches to the motherboard is defective.

Posted on Jan 08, 2010

Testimonial: "Thanks for the super quick reply. I was thinking along those lines. I'll take both units apart and compare them. Cheers Paul"

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