The Notebook Review forums were hosted by TechTarget, who shut down them down on January 31, 2022. This static read-only archive was pulled by NBR forum users between January 20 and January 31, 2022, in an effort to make sure that the valuable technical information that had been posted on the forums is preserved. For current discussions, many NBR forum users moved over to NotebookTalk.net after the shutdown.
Problems? See this thread at archive.org.

    T400 Noise on battary

    Discussion in 'Lenovo' started by KeJeon, Sep 24, 2008.

  1. KeJeon

    KeJeon Newbie

    Reputations:
    0
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    5
    My T400 is less than one month old. It works perfect when plugged in, but noticeable noise appears when unplugged.
    It sounds not like the dust in fan, also cosidered having it for 3 weeks, it shouldn't....

    So, does any one here have the same problem? Is that suppose to be noisy without power adaptor?
    Thanks for any reply.
     
    KeJeon, Sep 24, 2008
    #1
  2. Agotthelf

    Agotthelf Notebook Consultant

    Reputations:
    12
    Messages:
    101
    Likes Received:
    0
    Trophy Points:
    30
    Your TP suffers from, so called, cpu or coil whine.

    Try use Rmclock and disable C4 states of cpu, when on battery.
    This will reduce whine, but also battery time.

    Regards
    Andreas
     
    Agotthelf, Sep 24, 2008
    #2
  3. KeJeon

    KeJeon Newbie

    Reputations:
    0
    Messages:
    4
    Likes Received:
    0
    Trophy Points:
    5
    Thanks Andreas,
    Could you explain more? Like where I can find the Rmclock thing.
    Thanks again.
     
    KeJeon, Sep 24, 2008
    #3