I have a SyncMaster 740n which has a brightness/gamma problem. When I turn the monitor on I can see everything. But then right after it turns on it seems that the brightness/gamma fades down real dark. I can barely see the screen. However it still shows the screen. I faced it towards the sunlight and can barely make out my screen. I was thinking the gamma/brightness in the screen to be broken. But why would it show my screen perfectly for a second and then fade slowly dark?
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itdoctor
i am technician the advise i give here is only for wih out any responsiblity, this is only for technicians who know how repair lcd monitor in safe and controled enviromen, user or noon technician donot use at home, danger involves.
The samsung monitor 740n has 85 deg cap at c301 ,c311, c312 all 820 uf 25 v and fuse resistor of 3 amp r401 they all fail monitor does not work since there is to voltage to invertors. replace all the above with
1000 uf 25v 105 deg, replace them all and the fuse resistor too, it should work resolder dry joints. it is advise to change all caps if possible.
i have done several of this problem work fine for me.
SOURCE: Brightness indicator windows does not go away
Dear sir
This is common problem observed in many monitors compaq,HP,HCL,IBM this is happens mainly in rainy season due to moisture,by this moisture monitor button circuit get rust inside and button pad remain pressed. so it shows a strip at the middle of monitor like contrast or brightness. So this is minor problem just replace the monitor display control button sensor or circuit.Temporarily you can warm up the monitor by hanging a bulb of 60 watt nearer your monitor to takeoff the moisture.(Dont hang the bulb too near to the monitor). It definitely solves your problem.
Have a Nice Day
SOURCE: I have a Samsung SyncMaster 740N monitor has black
eduardo_iros, Read more of my responses to others in my FIXYA profile so that you will know ALL the options you have to doing a repair or having someone else do it for you!! Follow all the links to other web sites and you will understand why your monitor has a problem with BLACK SCREEN or BLACK and BLANK SCREEN. Your monitor no different than any other CCFL backlit LCD display!!! It can be fixed (DIY) for less than $10 (sometimes) or for 4x that if you contract out the work! Good luck with the repair. 12fixlouie. READ, READ, READ before you do anything.
This icon indicates the BRIGHTNESS control, more properly called
BLACK LEVEL. It adds or subtracts an offset, or bias, into the red,
green, and blue signals. This control should be adjusted so that black
picture content displays as true black on your monitor. Misadjustment of
this control is the most common problem of poor quality picture
reproduction on computer monitors, video monitors, and television sets.
Later in this document, I will explain how to set this control
properly. The setting is somewhat dependent upon ambient light. Modern
display equipment is sufficiently stable that frequent adjustment is
unnecessary.
This icon indicates
the CONTRAST control, preferably called PICTURE. It applies
a scale factor (gain) to the red, green, and blue signals. It affects
the luminance (proportional to intensity) that is reproduced for
a full white input signal. Once BRIGHTNESS is set
correctly, CONTRAST should be set for comfortable viewing
brightness.380 views
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