Samsung LA40A450 40 in. LCD TV Logo
Anonymous Posted on Jan 18, 2011

I notice my lcd brightness has reduce now this is 2 years old this problem remains same on Dynamic picture mode as well i have check this by connect to a pc and to a DVD using HDMI port and i tested non energy saving mode as well if i change energy saving mode and the picture mode (dynamic , stranded or move mode ) brighteners level change but not as l early days

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Electro Med Services

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  • Samsung Master 6,694 Answers
  • Posted on Jan 18, 2011
Electro Med Services
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Joined: Dec 13, 2010
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Hi,
First of all check the back light setting of your tv. you can see it on the picture setting menu.
Just check when you adjust the back light setting, is there is any change. if it changes and still not attaining the needed brightness level, then you have to check the back light inverter and the CCfL( cold cathode fluorescent lamp) used as back light. if there is no change in the black light, then the logic board or the inverter have some problem.
you have to check the inverter first is it getting the correct voltage from the power supply normally 24v.
if the voltage is ok , then u can do only one thing replace the inverter board to check whether the lamb have any problem. in normal case the inverter will become faulty. lamp fault is rare.

check all these. If you need further assistance fell free to contact me through fixya.
ok

  • Electro Med Services
    Electro Med Services Jan 18, 2011

    hi,
    also check the electrolytic capacitor in the power supply and inverter board.
    ok

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This may help you...you can also get an owners manual free on line.


English - 23
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