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.

    Broken inverter on 6831fx?

    Discussion in 'Gateway and eMachines' started by kimosabe55, Aug 26, 2009.

  1. kimosabe55

    kimosabe55 Notebook Enthusiast

    Reputations:
    0
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    5
    Backstory:
    The backlight on my 6831fx laptop goes out for entire days, only to come back to life after being off for a long time. It has never come back when left on. It is clearly getting worse so I went ahead and bought a new LCD, thinking the lamps are going bad; the problem still persists, still getting worse. I have a new inverter board (that little rectangular board just below the LCD) coming in from Hong Kong in a week or two that may do the trick.
    BUT HERE'S MY REAL QUESTION:
    Anybody think that my inverter problem could be coming from where the video cable connects to the motherboard itself? Anybody had experience with either a bad inverter board or a loose video cable?
    I'm thinking this may be the cause because the screen tends to go dark shortly after being jostled/ lifted up, but it may be coincidence since it's not always the case.
    Conversely, the inverter board's biggest chip looks to have some melted rubber covering a tiny lead that doesn't connect to anything. That lead itself dosen't worry me because I don't see anything it could connect to on the board, but that melted rubber is touching alot of the lead next to it, which is in use.
    Any help or thoughts would be greatly appreciated, and sorry for the wall of text.
    As a side note, this happened about 1.5 weeks before college started for me, so yeah I hate Murphy and his laws.
     
  2. stephen0205

    stephen0205 Notebook Consultant

    Reputations:
    8
    Messages:
    299
    Likes Received:
    18
    Trophy Points:
    31
    hi there, i had a problem with an invertor before, mine had screen pink flickering, i believe your lighting problem could be caused by the invertor itself and not the screen.

    you should be able to pick up an invertor at a resonable price, i had to replace my inverter cable, but your issue is with light, not the picture itself. Id bet if u get a new invertor youll be fine, to make sure its not the laptop itself, hook it up to an external monitor and see if it works
     
  3. kimosabe55

    kimosabe55 Notebook Enthusiast

    Reputations:
    0
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    5
    I've got an inverter coming in from China, but until then I have it hooked up to this behemoth CRT from the early 90's. Thanks for the information.
     
  4. stephen0205

    stephen0205 Notebook Consultant

    Reputations:
    8
    Messages:
    299
    Likes Received:
    18
    Trophy Points:
    31
    no problem , let me know if it solves your problem
     
  5. kimosabe55

    kimosabe55 Notebook Enthusiast

    Reputations:
    0
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    5
    So the inverter worked for a day and then died. Remember that the problem is intermittent though, and the screen had been working all day before I installed the new inverter so I can't rule out the flex cable as the culprit. Can anyone think of a way to verify if either the cable or inverter are working/damaged? Can I just put an ohmeter against the cable to tell if it's delivering voltage? (Obviously I have never used a ohmeter before.) Thanks again Stephen, I got some good info on your threads about painting and screen flickering.
     
  6. Starcub

    Starcub Notebook Consultant

    Reputations:
    10
    Messages:
    287
    Likes Received:
    0
    Trophy Points:
    30
    Most DMM's have a continuity tester. You could do a pin to pin continuity test for each pin, but that would be tedious as you would need to flex the cable while doing it. You've already spent quite a bit on a new inverter and screen, so you might be better just buying a replacement cable anyway.
     
  7. kimosabe55

    kimosabe55 Notebook Enthusiast

    Reputations:
    0
    Messages:
    11
    Likes Received:
    0
    Trophy Points:
    5
    Thanks for the advice.