Hi, I've read several posts about these board backlight but can't figure where my problem fit and I'm new at this so don't be too quick to roast me please.
Macbook had a broken LCD, changed the screen and when I got to test it there was no backlight. I inspected and saw that I plugged it the wrong way and thought I might have damaged the assembly. I tested with another known good screen housing and problem was still there so I figured it's a board issue.
I replaced the LCD connector, U7701 and also F7700 (was shorted) & L7701 (weird readings) from donor boards.
I'm getting intermittent backlight now, it's flickering on startup and stabilizes once booted only if I'm near maximum brightness. Voltage and continuity seemed fine but I reflowed U7701 as someone with similar problem did it and corrected the issue. After reflow, no more flickering BUT brightness controls didn't affect the backlight level so even at minimum it would light up and wouldn't shut down unless I closed the lid. I left it last night and today it's back, if I turn down brightness below 60-70% backlight is gone and there is still no gradation when it lights up.
I haven't tried anything else and figured I would ask you guys before sending it in and/or messing something.
Thanks !
Macbook had a broken LCD, changed the screen and when I got to test it there was no backlight. I inspected and saw that I plugged it the wrong way and thought I might have damaged the assembly. I tested with another known good screen housing and problem was still there so I figured it's a board issue.
I replaced the LCD connector, U7701 and also F7700 (was shorted) & L7701 (weird readings) from donor boards.
I'm getting intermittent backlight now, it's flickering on startup and stabilizes once booted only if I'm near maximum brightness. Voltage and continuity seemed fine but I reflowed U7701 as someone with similar problem did it and corrected the issue. After reflow, no more flickering BUT brightness controls didn't affect the backlight level so even at minimum it would light up and wouldn't shut down unless I closed the lid. I left it last night and today it's back, if I turn down brightness below 60-70% backlight is gone and there is still no gradation when it lights up.
I haven't tried anything else and figured I would ask you guys before sending it in and/or messing something.
Thanks !
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