Re: Apple macbook a1278 820-2936 need some help
Exact same behaviour: PLTRST# present but not POSTing? No beeps without RAM?
No oscilloscope to check activity on BIOS CS# or LFRAME#?
Tried yet another BIOS?
Could still be (in order or probability and easiest to replace) SMC, PCH or CPU.
Or some random missing/corroded resistor, so be sure to go through the whole board under the microscope to spot anything wrong.
Exact same behaviour: PLTRST# present but not POSTing? No beeps without RAM?
No oscilloscope to check activity on BIOS CS# or LFRAME#?
Tried yet another BIOS?
Could still be (in order or probability and easiest to replace) SMC, PCH or CPU.
Or some random missing/corroded resistor, so be sure to go through the whole board under the microscope to spot anything wrong.
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