Acer Laptop Screen Problem-Inverter or Backlight

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  1. Posts : 109
    Windows 7 Ultimate x64
       #1

    Acer Laptop Screen Problem*Updated* w/ Video


    Sooooo.... I'm working on a free hand-me-down laptop. Had a hard drive problem, which I fixed and happened to find 4GB of RAM to toss into it... and what do ya know, the screen starts messing up as soon as I fixed it...

    The laptop is not very old so I would like to fix it... onto my problem.



    The screen sort of "flickers" and "moves around" and also has a pink tint to it every once in awhile. The screen is this way as soon as I power on the laptop, and having it plugged into the wall proves no difference. Another strange thing is, if I leave it on, after about 5-10 minutes its works perfect, but only for about 15 seconds, then back to like the picture above.

    - Tried hooking it up to my desktop monitor, works great.
    - Took this thing apart, checked the all of the wire connections, seem to be solid and fooling with them with the lappy on did no justice. I'm stumped basically.

    So now I'm wondering, backlight or inverter?

    EDIT: Oops forgot the laptop info
    Acer Aspire 7520-5071
    17" Dual-Core 4GB RAM
    Any comments/help?

    Thanks in advance,
    -Shook
    --------------UPDATE----------
    So I tried an inverter.... no fix
    Noticed that while messing with the video cable to the LCD made the screen go in and out.....
    Ordered a new LCD cable.... no fix


    Sooo I made a short video
    http://www.youtube.com/watch?v=d9vAGRl3ewc
    Last edited by Shook; 13 Jul 2010 at 00:42.
      My Computer


  2. Posts : 10
    Win 7 Enterprise x64
       #2

    Normally when the backlight goes out, it will affect the full screen. It can flicker or go out completely. This can be checked with a flashlight held up to a text area on screen and looking for the contrasting image on the LCD. From the way you describe the working then stopping, it sounds to me like the inverter is building up a charge then letting go.
      My Computer


  3. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       #3

    If it happens the inverter to be messed-up, those Acer computers are easy to unmount. Try to find the inverter on *bay or amazon
      My Computer


  4. Posts : 109
    Windows 7 Ultimate x64
    Thread Starter
       #4

    Trembyle said:
    it sounds to me like the inverter is building up a charge then letting go.
    So your money is on the inverter?

    Yea I've found an inverter for around $20-$30 on eBay. Very easy to change, have had it open already. Just hoping someone knowledgeable with LCD screens, would be able to tell me if it was in fact the inverter or the CFL bulb(which I would contemplate changing myself, but sounds like quite the pain in the ass)
    Last edited by Shook; 26 Jun 2010 at 23:49.
      My Computer


  5. Posts : 10
    Win 7 Enterprise x64
       #5

    After looking at your screen shot again, I looks more like a video cable issue on the LCD. If you can inspect the ribbon cables around the LCD and look for any place there is a sharp bend, it could be a broken trace in the ribbon cable, or a loose /unseated connector.
      My Computer


  6. Posts : 1,641
    Dual-boot: Windows 7 HP 32-bit SP1 & Windows XP Pro 32-bit SP2.
       #6

    I would say it is a loose connection, so do have a look.
      My Computer


  7. Posts : 1,794
    MS Windows 8
       #7

    yeah..it may have been a loose connection with the LCD..happened to me before with the same brand but different model...
      My Computer


  8. Posts : 109
    Windows 7 Ultimate x64
    Thread Starter
       #8

    I have had the whole thing apart, checking the cable for loose connection, checking the insulation of the wires, but nothing looked suspect to me. I have the whole screen apart at the hinges and the body of the laptop down to the motherboard.
      My Computer


  9. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       #9

    Shook said:
    I have had the whole thing apart, checking the cable for loose connection, checking the insulation of the wires, but nothing looked suspect to me. I have the whole screen apart at the hinges and the body of the laptop down to the motherboard.
    What's about this piece...behind the Lcd, is it well plugged? :
    Attached Thumbnails Attached Thumbnails Acer Laptop Screen Problem-Inverter or Backlight-capture1.png   Acer Laptop Screen Problem-Inverter or Backlight-capture2.png   Acer Laptop Screen Problem-Inverter or Backlight-capture3.png  
      My Computer


  10. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       #10

    Could be here aswell...move it or try to unplug and replug carefully:
    Attached Thumbnails Attached Thumbnails Acer Laptop Screen Problem-Inverter or Backlight-capture.png  
      My Computer


 
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