I'm working on a Macbook Pro 15 2015 that has no liquid damage on it. The board power on without post, no chime , black screen. I check the Voltage on L8300 and I have 0.0V nothing. I also check U8300 I have 5V on PIN 1 but missing LCD_5V_EN on PIN2 0V. Is not detecting the LCD screen. Any help greatly appreciated.
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Last edited by MobileXT; 03-10-2021, 09:19 PM. -
Re: Macbook Pro 15 2015 820-00426 No PP5VR3V3_SW_LCD_UF
Update:
I get it to chime but no video and backlight. I already replaced U8300 and same issue no video.
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I have read many forums that state the Macbook Pro 2015 needs / does not need a battery to boot. I'm not convinced as yet which is correct.
The Macbook Pro mid 2015 I have has no battery and do not really want to buy one just to test.
This model has the newer trackpad which is not clickable when turned off.
At the moment, without battery it does turn on with no display (with backlight), no chime and then turns off after 13 seconds. I see this from the power draw on my DTPS.
If I hold the power button whilst connecting the magsafe 2 charger it turns on, again no image but... -
Hi everyone!
I have a 2018 MacBook Pro (with Sequoia OS) that I've been using for years with no problem. I recently received an M2 MacBook Pro so I'm mostly using it and not the 2018 one, but since a friend of mine needs a computer, I thought I could restore my 2018 and give it brand-new-like to my friend.
I tried using the built-in tool to restore the MacBook (Settings > General > Transfer or restore > Delete) but it got stuck when trying to remove the Find Device configuration (it asked me for the password for my old Apple ID -now I use the same account but...06-27-2025, 08:54 AM -
Hi there! I have not so usual situation...
I have 2015 MacBook Air A1466 EMC 2925 with 8Gb of RAM. It seams that I've killed it by bad SSD adapter. It starts, cooler works... But no chime, screen is black. SMC reset seams works, NVRAM reset doesnt works...
My repair guy has checked all possible. It's all ok with power. The last idea - I could kill EFI firmware... So, I need a firmware of EFI to check it. I have a programmer. But I don't have a similar laptop now to download it and compare
P.S. If you have else any ideas about repair, or you had a similar...12-20-2024, 02:31 PM -
Apple MacBook Air 13" Early 2015 Service Guide...10-15-2024, 02:06 AM
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Hi everyone, a customer brought me an original Apple SSD (mz-jpv2560/0a4) from a 2015 MacBook Pro to ask me to recover the data. He told me that the computer was taken to the Apple center but that there was a problem with the motherboard and therefore it could not be repaired....
However they removed the SSD so for try to recover data
I tried to insert this SSD into another 2014 MacBook Pro that I had but the SSD could not be seen either from the recovery or from an operating system started from USB (BigSur or El Capitan)
I also tried with a USB adapter but nothing
I also...
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