Mac Pro 2009 will not start, no edge

On Thursday, June 16, I sat to use my Mac Pro early 2009. I noticed that my Mac would not wake up by mouse click or the SPACEBAR on the keyboard. The led on my Mac, so I immediately thought that it was a problem with the graphics card.

I force shut down the Mac by holding the power button. I waited 10 seconds and turned on my Mac back, everything was fine and I worked on my Mac for 3 hours.

Last night 18 June I sat watching television when I heard the ringtone on my Mac Pro, I realized was a reboot. I went to the wire and connected and everything seemed fine. However later in the evening, I noticed a flashing LED on one of my two monitors. Once the Mac was on (fans spinning) but no signal to the monitor.

I made another force off now the power button on Mac, but now when turn on the Mac there is no boot chime or control signal.

I upgraded the graphics card to an AMD Radeon Sapphire HD 7950 in April 2013.

Any advice would be much appreciated as I'm in the middle of a big project.

Could also be a Mac Pro RAM chip inyour failure, sounds almost identical to a question I've had recently, I found the missing question when I removed the memory card.

If one of the pair of cards, you will need to remove two cards.

Try taking the memory OUT n test each module one at a time. Also check RAM editing maps, if none of the four lights on the two cards is turned on it idicates a defective module.

Tags: Mac

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