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The sensor behind the plastic readout window needs to be exposed to a sufficient amount of light to alter the display brightness from dark room mode to bright room mode (dimmed display, bright display). Be sure sufficient light falls on the digital readout display when desiring the display to be at its bright mode setting.
The back light is typically an integral part of the LCD display, so you may have to replace the entire display. On some displays, the touchscreen and back light connections are separate from the display and on some displays, these connections are soldered to the LCD display. Trying to take apart the LCD display just to change the back light can result in breaking the LCD display. You are better off just replacing the entire display if you can find it for that model.
Hi, when a phones display light does not come on,there is an IC that makes the display light comes on. When the IC that makes the display light is bad, it will not make the light come on.
When you replace the IC, the display light will come on again.
Display
light does not turn off in sigmatel t33i. When the phone is switched
on, the display light turn's off, as the time setted in the settings.
But after a incoming call or entering in multimedia, the display light
does not turn off in the sigmatel fxd t33i..
change the display IC near the main board strip connector, there r two ICs the one on the right side is for mini display , re heat it if it doesn't work after changing the IC ;)
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