Unexplained sounds, including clicking, grinding, and variable fan noise when the computer is not being heavily used may also be symptomatic of a failing Mac logic board. These issues can affect onboard screens or external monitors, particularly when concerning Macbooks or other portable Macs. Mac fails to power-on or complete its boot sequence, the logic board could be at fault.Ĭorrupted graphics or intermittent display failures can signal a failed or failing logic board. This will help you confirm that it is indeed the logic board and not any of its associated components. When troubleshooting a bad logic board, it is important to test any and all suspect components in the process. Logic board failures can be difficult to pinpoint because a Mac’s logic board connects many of its components, frequently including the processor, RAM, ROM, hard drive, fans, expansion slots, and ports.
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