A1502 macbook pro having an issues which is backlight goes off after Apple logo with loading bar screen. LCD display OK (With BAcklight On) when it power on in SMC bypass mode. Any ideal where when wrong?
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Re: Macbook Pro 13" A1502 backlight goes off
I found this method once after digging in to the internet when I was stuck in such problem on my MacBook Pro. It worked for my MacBook Pro..But I don't know if it would help you as it did for me.
Press the Power / OFF button once – this will bring up the dialog box which you can’t see
Press the “S” button – this is the shortcut to sleep the Mac
Hold down the Power button until a hard shut down is forced
Wait about 15 seconds, then hit the Power button again to turn it back on
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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... -
Happy Sunday guys ;-)
I have a macbook pro 13 A1502 on my hands with a backlight problem.
After the measurements I noticed that PPVOUT_S0_LCDBKLT shorted to ground, in order I removed the following components:
C8300 and C8303 and always at pin 1 of both short circuit present;
D7710 short circuit present at pin 2;
R7731 and R7732 and short circuit always present;
C7713,C7714,C7715,C7716,C7717 and short circuit always present;
I also replaced the LVDS connector but the result hasn't changed, even without the connector on the logic pin 1 is shorted..... what... -
Hello,
i have a Macbook A1502 with No Backlight but the image is on as confirmed by a flashlight.
the macbook was dirty so i went ahead and cleaned it. the light back on for a couple of minutes and now its again back off.
The resistance of the Pins at j8300 look okay as confirmed by tallying from a donor board.
I think its a mosfet issue with the Q7701 but never quite understood how these things work.
Can anyone guide? -
Hi all
I have a Macbook Pro A2442 with the 820-02098 from a friend which has no picture on the display, however, the backlight works.
He was streaming a football match on a questionable site, then the site crashed, and the problem emerged.
Initially, he sent it to apple, who quoted him £1323.95 to replace the display, lid angle sensor and top case.
Obviously, he decided against this and gave it to me so that I could have a crack at it.
From initial diagnostics, I connected to an external monitor, I first tried with a HP 22W monitor, and I booted into the boot menu... -
Hello Everyone,
I'm looking at purchasing a used LCD from ebay for my macbook A1990 2018 15inch which LCD I cracked. Since new / used but working displays cost around 500$ , I found a Grade A+ LCD display for A1990 which has a good price of 110$ but has no backlight.
I would need just to make sure that what I know/my reasoning is correct:
- No backlight means flexgate issue, therefore changingthe flexcable would be enough (I can microsolder to fix the flexgate problem, done it a few times already)
- Seller confirmed its a LCD issue, and not an issue with the...
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