Hi all, working on a Apple MacBook Air A1466 (Logic board 802-00165-A). No chime or image??? Where checked the voltages on the main logic board, nearly all are present, 3.3, 5.0, 8.6, 1.6 for ram & CPU Core all present, ALL_SYS_PWRGD & CPU_VCCST_PWRGD also present & even get a normal fan spin. All voltages on the SPI_ROM are present. I even replaced the rom with a known good one but still no image or chime. The LCD backlight voltages even are normal. Can anyone help me in this? Am I missing any voltages yet to be checked. Thanks in advance.
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Last edited by mferna14; 10-18-2019, 05:22 PM. -
Re: Apple MacBook Air 820-00165-A no image
What was the original problem? History of the device? Liquid damage? -
Re: Apple MacBook Air 820-00165-A no image
PRAM resetOpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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Re: Apple MacBook Air 820-00165-A no image
Original problem was liquid spill & no ALL_SYS_PWRGD & CPU_VCCST_PWRGD voltages & no fan spin. Cleaned & replaced all the corroded parts, then all started to work but no image or charm after that.. anyway I will do . PRAM reset as "piernov" tell me to do so & then back to you guys again.Comment
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Re: Apple MacBook Air 820-00165-A no image
PRAM reset did not help.. still the same condition, fan spins like normal, CPU heat up like normal too., but still no image. Kindly any further tips will surely help.Comment
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Re: Apple MacBook Air 820-00165-A no image
Mabye boardview can help
https://www.badcaps.net/forum/showpo...34&postcount=2Comment
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Re: Apple MacBook Air 820-00165-A no image
I measured each & every single S0 rail & all seem to be present. No rail missing, have no idea what's going on. Think the video chip maybe faulty??? Is there any way to test whether its working or not without an oscilloscope???Comment
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Re: Apple MacBook Air 820-00165-A no image
U6100 check for broken traces, dirt under smc-(reflow)Comment
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My MacBook boots up with a dim backlight and a blurry Apple logo, but then the screen goes dark and displays no image. Has anyone else encountered this problem? What could be the cause, and how can I fix it? Here is a link to a YouTube Short demonstrating the issue: https://youtube.com/shorts/wCkF0xwMaCk
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