i have an lg 47LW450U lcd, ive replaced the main board after the old one was apparently damaged by a spark between the hdmi port and a laptop hdmi cable.
the new board is working but every 2 to 3 seconds the brightness of the screen changes, dimm bright dim bright continuosly. its only a slight change and either setting would be ok if it stayed on one. ive reset the picture and settings. its doing this on any input or with no input connected. its like either the backlight level is changing or the screen contrast or brightness setting is changing, i think it is the screen setting not backlight. i have a plug in power meter thats not showing any change in power drawn.
any idea what would cause this? thanks
the new board is working but every 2 to 3 seconds the brightness of the screen changes, dimm bright dim bright continuosly. its only a slight change and either setting would be ok if it stayed on one. ive reset the picture and settings. its doing this on any input or with no input connected. its like either the backlight level is changing or the screen contrast or brightness setting is changing, i think it is the screen setting not backlight. i have a plug in power meter thats not showing any change in power drawn.
any idea what would cause this? thanks
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