Hi! I have almost the same power supply (BN44-00517A, I suppose the only difference is in the shape of the power connector), but in my case another converter (logic power supply) failed, and the backlight channel should be working. I can measure almost any element of interest on my board in the next few days (including SMD capacitors with a meter). What element values do you need? On my board, the CM804 capacitor burned out, and I can't read its marking. Could you take a photo of its marking on your board?
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Hi Dhikn,
Yesterday I've managed to repair my board.
In addition to other faulty elements, one Zener diode was also faulty, but it measured ok with a diode checker, so it went unnoticed.
On my board CM804 is a ceramic capacitor 220pF, 1kV (marking is 221K) - it failed on my board for LED power also.
When replacing, put a 2 or 3 kV capacitor - it failed because of low voltage rating.
If it has failed then some other components are dead also - resistor 0.24 ohm RM812 (on my board), MOSFET, etc...
The schematic is pretty straightforward, and the PWM controller SSC2S110 is available on Aliexpress.
Good luck!
DinkoComment
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Thank you! I managed to fix the power supply too.Comment
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hi all, got this macbook with dead trackpad. after some investigation i found that fuse is bwlown. it's marked with a K on it. anyone kjnow it's value ? it is a 0402 package.
another problem is: i tried another trackpad that was working fine, but the feedback sensor was not. all volts are present, but the click mechanism isnt . -
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