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Use the advanced options page and reset the factor blue and red convergence defaults then do re apply the auto color defaults color at first it seemed very red (which is good because red was the missing factor in the green picture) but after reseting all the color and tints to the normal ranges I then reset the color auto correct again and all seems fine.
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If the picture mode is set to Cinema or Custom, the screen could become dark. If the screen is still dark after the picture quality mode has been changed, change the setting Backlight, Picture, Brightness and adjust the brightness to your taste. ... Depending on such settings, the picture brightness level can be higher or lower
Since you do not supply information (type, brand, model, age)
about your set, it is difficult to guess at your problem. The settings are there (contrast, brightness, color) for you to readjust the set as it ages and are not often used past the setup stage when you get a new set.
Gamma is the base level to set the black part of the signal.
I do not know what lamp you would have in a TV set.
Hello If baklight CCFL tubes become weak, the brightness will be very weak. Now you can see the picture with least brighness. So it is sure that, the backlight inverter board is working well. Just check the CCFL lamps. For a 37 inch LCD tv may have atleast 14 CCFL lamps. When replacing, do replace all at one time. OK.
Hi: You may have a problem with the inverters in the unit, they are responsible for lighting up the back panel. Check or have checked the power supply voltage to the inverters, should be around 18-24 volts DC. Also leaky capacitors on the power supply will cause this issue as well as leaky or puffy capacitors on the inverter.
you can bring more brightness by removing cover on your tv and then you will see ther 2 button ther in back of your tv one is FoCUs and other is G2 rotate the G2 button till you see more brightness on your screen put the cover back and that is if you dont know to do that go to one authorised service
Your ballast may not be up to 100% of its rated capabilities, thats often the cause when the brightness level gets to unwatchable levels. You may need to troubleshoot the ballast voltages a defective ballast can usually cause a lamp to loose about 60 % of its brightness levels. The other possibility could be the DLP mirrors need polishing but that is something better left to a repair shop as the DLP mirrors are sensitive
Has it been dropped?
At first it sounded like it may be have been an intermittent short if the CRT guns, but it's hard to say.
Since it doesn't seem to be the cable, it sounds like this one needs component-level troubleshooting.