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.

    U300 Dead Backlit

    Discussion in 'Toshiba' started by Rhodan, May 11, 2008.

  1. Rhodan

    Rhodan NBR Expert of Nothing

    Reputations:
    374
    Messages:
    1,222
    Likes Received:
    102
    Trophy Points:
    81
    A friend dropped water near the back of her U300. After letting it dry for a few days the laptop works fine except there`s no backlit.

    The screen does come on, you just need an external source of light to see it.

    Damaged LCD or Inverter?

    Thanks
     
    Rhodan, May 11, 2008
    #1
  2. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

    Reputations:
    7,197
    Messages:
    28,841
    Likes Received:
    2,166
    Trophy Points:
    581
    The symptom you describe indicates the backlight is not working but the LCD panel itself is OK. I would suspect the inverter. It produces a high voltage for the backlight tube and would be particularly vulnerable to any water.

    John
     
    John Ratsey, May 11, 2008
    #2
  3. Rhodan

    Rhodan NBR Expert of Nothing

    Reputations:
    374
    Messages:
    1,222
    Likes Received:
    102
    Trophy Points:
    81
    Thanks!

    I`ll try replacing the inverter first.
     
    Rhodan, May 11, 2008
    #3
  4. Rhodan

    Rhodan NBR Expert of Nothing

    Reputations:
    374
    Messages:
    1,222
    Likes Received:
    102
    Trophy Points:
    81
    Alright another question...

    The model she has is the U300-NS5 (psu30c-ns508c). I took the inverter out and the part number is AS023173359.

    Does Toshiba use the same inverter on all U300 models? I found one inverter AS023173100 which is supposed to be a replacement for A000015890 and the vendor says it`s compatible with all U300 models.

    Thanks!
     
    Rhodan, May 11, 2008
    #4