Mac Pro (early 08) no power, no POST

[hakukani]

I've had my 8 core mac pro for a bit over a year now, and it's been a great little box---til now.

I live in a fairly humid climate, so I've always pretty much left electronic things on most of the time--they seem to like it.

However, over Xmas, I took a trip, and turned all my gear off. When I returned, I pressed the button to start my mac pro---nothing, nada, like it was unplugged still. Being an OK troubleshooter, I started by making sure cables were ok etc. Did a search to find if anyone else had a problem. Then, I looked up how to reset the SMC. Up until the 8 core, there was a button. No more on the Mac Pro 8 core. They said unplug for 15 seconds to reset. No joy there.

I had determined to take it to a shop, and decided to try one last time before I put it in, a couple of days later. Voila! It booted! Everythings cool......

Until the beginning of this week. While I was out, there was a short power failure, and it started the same thing.

Sorry for the long post, but TIA for any ideas. I'm still scratching my head....

 

[jjahshik32]

Only thing I can tell you is to ship it off to apple care.

 

[Caviar]

Hi, I'm new here. I was browsing this forum cause I was curious about the New Mac Pro's and came across your post.
And decided to sign up to reply.

To the main topic...
This is just a guess, but maybe its a condenser problem in your power supplier or mother board. So you may need to replace the power supplier or mother board. But this is just all a guess.
And if the reason is the condenser, the reason why it doesn't boot up after leaving it off is the heat.
If the condensers are warm enough, there might be a chance it will boot up again. But after its completely cooled you'll have a really hard time turning it on. Even if you successfully turn it on, you might run out of luck eventually.

So like jjahshik32 said, you should send it to Apple.

 

[hakukani]

Well, there's a happy ending.

Thank you Caviar, for giving me the idea. I set the unit in the sun for a couple of hours, and it fired right up.

Apparently it's a function of cold and humidity. It's been rainy and around 52-68 degrees for the past week or so (I'm in Hawaii-we don't heat or cool our houses).

 

[jjahshik32]

either way u need to get the power supply or something replaced, it shouldn't matter what temperature the machine is under.