Apple MacBook Air 13" A1932 2018. It's on. Touchpad clicks and board gets warm. There is no start-up sound and the display stays black. The audio board was defective after liquid damage. Nothing is visible on the logic board. bild comes with another logic board. So display and cable are intact! I have both logic boards here and can also measure on both.
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A1932 - Black screen, no startup sounds
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Re: A1932 - Black screen, no startup sounds
Compare notes with the working unit.
For the logic board with the working backlight, do you have the display connected ? Pretty sure that you will need to mate the display to allow for the logic board to turn on the backlight.
Respectively, need to check under the same conditions as the working board, if the backlight IC is being ENABLED on the non-working board ?
Is the DC input to the backlight fuse OK ?
The I2C pins are not stuck on the backlight IC ?
Proceed with patience and care to prevent damage.
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Re: A1932 - Black screen, no startup sounds
Perhaps a different housemark.
Did the vendor state the part to be the same as the original backlight IC ?
Worth testing with 1 device.
Post the bottom side pic of the new part. The defective one needs to be replaced of course but do make a note of the pin #1 orientation for this surgery.
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