Re: Black Spot in Corner


"Someonenew" <lynn.ca@xxxxxxxxx> wrote in message
news:4956e8f2$0$5498$9a566e8b@xxxxxxxxxxxxxxxxxx
I have a Dell Latitude 610. The bottom left corner is turning black and
gets very very hot. When it gets to the size where it covers the logo on
the start button the screen turns black.
........when I rub the black spot it does go away but it gets too hot to
touch after awhile and the black spot wins and shuts off. Just wondering
what is causing this?


This is a failure mode of the CCFL lamp that lights your laptop display.
Although the 'CC' in CCFL stands for cold cathode, they in fact operate
anything but cold. The failure mode results in one (or occasionally both)
cathode(s) running much hotter than they should. This extra heat heats up
the immediately adjacent part of the LCD display preventing it from working
properly (the black spot). Rubbing the black spot causes the liquid in the
display to move about a bit temporarily cooling that part of the display
just enough for it to work again (plus your finger takes a small amount of
heat away).

The solution is to replace the CCFL lamp but this is usually not as easy as
it sounds. It is just possible that a fault in the inverter has caused the
problem, but most often it just occurs.



.

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