Why iMac 2011 mid 27' only run smoothly with an external monitor?
Dear iMac superman
my second hand imac has been frequently reboots since June.
i found that it stops reboot, stop auto restart only when i connect with an externally powered screen. the youtube can run smoothly for 1-2 hours. But when i type something on search bar in google, there is a lag.
my question is:
- is the failure cause on power supply unit, graphic processing unit, logic board, or a mix of them?
- i run a nova benchmark test, gpu is zero score. does it mean GPU died? but my youtube runs smoothly,
please help. thanks.
Esta é uma boa pergunta?