Mac Pro Late 2013 Can't Turn On
Hi,
I have Mac Pro Late 2013 D300, shipped with Mavericks 10.9.5 and works fine without any problem for 2 years (i'm buying it at early 2015).
Two weeks ago, I update to El Capitan 10.11.5, the problem is it can not turn on after shutdown. Press power button, its dead, and only turn motion sensor light. Press power button for 10 second and more, nothing happen.
Can't solve with "standard" SMC Reset. The Mac Pro can turn ONLY if disconnect power cable for 15 minutes or more, then plug in, then wait for 15 second or more. When press power button, the motion sensor light is active.
If can turn on, i have trying to PRAM reset. It's not working.
Trying to clean install latest Sierra, the problem still there. I'm not trying back to 10.9.5. I'm not sure, this related to software/firmware or hardware. Bad news, it's not under warranty.
Now I never shutdown, just sleep, and sleep. No problem with wake after sleep mode.
Any suggestion? Software/firmware or hardware? Maybe power supply problem?
Thanks and really sorry about my English.
Mac Pro, iOS 10.2