Re: Apple macbook a1278 820-2936 need some help
Maybe I'm missing something but there are no information about ISOLATE_CPU_MEM_L state at power-up (I'd think it's handled by the BIOS). So not much we can assume about it…
The USB mouse trick is that on most optical mouses the LED will not light up if the BIOS is not POSTing (as the USB controller hasn't been initialized yet), it's only an additional hint to know what could be the issue.
Maybe I'm missing something but there are no information about ISOLATE_CPU_MEM_L state at power-up (I'd think it's handled by the BIOS). So not much we can assume about it…
The USB mouse trick is that on most optical mouses the LED will not light up if the BIOS is not POSTing (as the USB controller hasn't been initialized yet), it's only an additional hint to know what could be the issue.
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