The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.
Hi, I have a Mac Pro 2012 and when I try to turn it on, the first 2 LEDs above start a red light, it blinks quickly only once when I try to turn it on.
2 
Can you post a video of it?
由 Ben Capehart 完成的
@beanman56 right now I don't have the mac, but it's just 1 simple blink, I've already removed the video card memories and it always does the same
由 francis 完成的