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    Is charging curcuitry on Lenovo laptop faulty ?

    Discussion in 'Lenovo' started by ronbarak, Jan 3, 2011.

  1. ronbarak

    ronbarak Newbie

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    Hi,

    The battery on my Lenovo laptop stopped getting charged. Since it's about 3 years old, I bought a new battery.
    However, the new battery is not being charges either.

    I checked the voltage between all the connectors going to the battery from the back of the laptop, and below is what I found (the connectors/poles with yellow colour are the ones being tested. When a pair is not indicated, the voltage was 0).

    [ -]_NNNDCN[ +]: voltage drops by 0.01V every ~3 seconds. Currently at 1.96.
    [ -]_NN NDCN[+]: 3.16V, stable.
    [ -]_NNN DCN[+]: 3.26V, stable.
    [ -]_NNND CN[+]: 3.26V, stable.
    [ -]_NNNDC N[+]: 2.02V, stable.

    [-]_NNND CN[ +]: voltage rises by 0.01V every ~3 seconds.
    [-]_NNN DCN[ +]: voltage rises by 0.01V every ~3 seconds.
    [-]_NN NDCN[ +]: voltage rises by 0.01V every ~3 seconds.
    [-]_ NNNDCN[ +]: voltage drops by 0.01V every ~3 seconds.

    From the above I can see that when [ -]_NNNDCN[ +] are connected, I don't get the expected 9.6V to 12.6V.

    Does the above indicate that the laptop's charging circuitry is faulty ?

    Thanks,
    Ron.

    P.S.: Laptop is Lenovo 3000 Y200 (Disney). OS are Windows 7 and Ubuntu 10.10.
     
    ronbarak, Jan 3, 2011
    #1