So is the screen blanking out due to a bad flex cable? Has anyone been able to remove the lcd without cracking it? If so what is the secret? I've done 4 of these already and have never successfully been able to remove the adhesive without cracking the lcd. I've tried heat as well, it actually made it worse.
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do you have a link? I can't find any that cheap
I got this screen to come back with the opening and closing dance again....turning promotion down to 47hz helped. it was working for around 5 hours today. then I switched it back to promotion and it went off again after 15 minutes 🤷Comment
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can be liquid damage of TCON board/or motherboard. but you cannot remove LCD without damage. what left? use WD-40, sometimes it helps
ps. wd-40 can make stain on screen. be aware
https://www.alibaba.com/product-deta...333383380.html
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I'm working on a MacBook Pro A2442, board 820-0298-A. This device was liquid damaged and had no power. After I repaired the liquid damage, I find the device powers on and works with external video, but backlight is not working.
Anyway, I really want to improve my fault tracing skills, instead of having to rely on others to always tell me where to look and what to check. In this case, I have a question about navigating schematics. If I wanted to trace the backlight power circuit, how do I find where that circuit begins? If I search for "lcd" in the schamtic, it is listed... -
Hi! I'm a bit new to this whole repair world. But this is what i'm working on:
A Macbook Pro A1990 (820-01814) from 2018. It has no image – or backlight for that matter.
No history of liquid spills or anything. It's fully functional on external monitor - and the webcam works.. But it doesn't seem like the internal display is even detected.
Sometimes the backlight lights up, when booting into recovery mode. (No image still)
That's the only progress I've gotten.
I tested the panel on another Macbook, and the display worked perfectly.... -
Hi all! MacBook Air A2337. There are no traces of liquid or obvious damage, the motherboard is visually in perfect condition. The image is displayed on the external screen, but only the backlight works on the internal screen. There is no image, and the camera on the built-in screen does not work. How to exclude during diagnostics that it is the screen that is broken and not the motherboard? What signals should be present on the connector with the screen removed and connected?02-07-2024, 08:07 AM -
Hello all,
Am trying to figure out this backlight issue with this A1990 Macbook Pro.
Tests performed:
There is no backlight even with a good screen.
Backlight IC is receiving the correct support voltages.
Fuse F8400 ok
Current sense resistor R8400 ok
Backlight IC is receiving 3.3V on enable pin.
Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
Backlight IC receiving 5V from PP5V_G3S
Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
I2C_BKLT_SCL and I2C_BKLT_SDA both measure... -
Hello,
On this Macbook Air A1466 with 820-00165
I have only 8V on backlight line but no high voltage in boost circuit, I have checked all components like caps and diode and they seems to be ok.
I have noticed that when macbook chimes after turning on there is no image at all even with flash light,
I have tried 2 different OEM LCD and still there is no image,
I see the LCD fades out when i remove power or turn off the macbook.
I have 2 problems
1 No image
2 No backlight, but i have 8VDC on backlight circuit.
...
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