Briefing Apple Knowledge

which of the following would help further isolate the issue?

If the computer is experiencing any power issue, such as not starting up, not displaying
video, sleep issues, or fan noise issues, which of the following would help further isolate the
issue?

A.
Reinstall OS X

B.
Reset the System Management Controller (SMC)

C.
Reset NVRAM

D.
Startup in Safe Mode