1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

How to identify screen burn or blotchy problem in corners

Discussion in 'TVs' started by Chas10_4, Nov 14, 2004.

  1. Chas10_4

    Chas10_4
    Standard Member

    Joined:
    Nov 13, 2004
    Messages:
    4
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    1
    Ratings:
    +0
    Just bought a graded Sony 36FS70 and find there are dark shaded blotches n all 4 corners, when a white or light coloured backgrouns is displayed. Not visible when darker pictures are on screen.

    They are not linear as would be the case if it had been left in 4:3 mode with that type of screen burn.

    Is this possibly a setup problem, or is this maybe why the set is graded and sold refurbished?

    Any thoughts.
     
  2. gringottsdirect

    gringottsdirect
    Active Member

    Joined:
    Jan 11, 2002
    Messages:
    2,896
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    71
    Location:
    50 Rue St Georges, Paris.
    Ratings:
    +27
    It probably just needs a thorough de-gaussing after being moved.
    This particular tv has a stronger than usual internal de-gausser but a manual wave in front of the tube by a service engineer or by doing it yourself if the dealer will lend you one, with instructions for use.
    Have you any large speakers close by the tv ?

    I would be surprised if it is anything more serious. :cool:
     
  3. Chas10_4

    Chas10_4
    Standard Member

    Joined:
    Nov 13, 2004
    Messages:
    4
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    1
    Ratings:
    +0
    Thanks for the tip, i'll try to borrow one. I was led to believe that Sony TV's degaus on every startup.

    The only speakers there are the internal ones left and right.
     
  4. LV426

    LV426
    Administrator Staff Member

    Joined:
    Jul 14, 2000
    Messages:
    12,815
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Location:
    Somewhere in South Yorkshire
    Ratings:
    +5,025
    All CRT TVs do degauss on startup. However, with large CRTs this dark shading can be a permanent feature. It's a misalignment issue in the tube. One of the not-so-perfect attributes of CRTs. It can be cured by a competent engineer by attaching some tiny permanent magnets to the neck of the tube.
     
  5. Chas10_4

    Chas10_4
    Standard Member

    Joined:
    Nov 13, 2004
    Messages:
    4
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    1
    Ratings:
    +0
    Thanks Nigel that gives me something to discuss with the shop.
     

Share This Page

Loading...