2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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2.7Ghz i7 - board problem

Hi,

macbook A1398 mid 2012.

I have a 2.7Ghz i7 16gb ram board... had liquid damage.

Plugged into magsafe, the board starts, fans spin faster and faster, but it doesn't actually do the POST or any display output.

Was described as 'working' for a while after liquid damage, then wouldn't power on.

Measured it and there is no voltage to the CPU.

Any feedback much appreciated.

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It was Renesas RJK0222DNS chip, after replacement board is working flawlessly!

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1 Answer

Chosen Solution

Check ALL_SYS_PWRGD and if missing, go backwards from there. Could be basically anything. Measure all the signals required for the CPU to initialise.

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