I have a MacBook Pro A2159 on the Mac everything was fine. But since I used the board in another Mac I think it was a A2289. I no longer have a picture. The display is dark! The MacBook works perfectly on the external monitor! Can a certain chip be broken because I connected the wrong display?
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Re: A2159 Display Dark after board test in wrong Model
Check the local lcd fuse. -
Re: A2159 Display Dark after board test in wrong Model
You know the position of Fuse?Comment
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Re: A2159 Display Dark after board test in wrong Model
See attached.Attached FilesComment
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Re: A2159 Display Dark after board test in wrong Model
thxComment
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Re: A2159 Display Dark after board test in wrong Model
The Fuse is ok ;-( and 12,5VoltsComment
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Re: A2159 Display Dark after board test in wrong Model
See attached.
Check the voltage for the LCD power rail.
You can measure this voltage at the component shown in the boardview file.Attached FilesComment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
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