G5 suddenly will not boot up.

Ok...this is serious for me, so I'm panicking.
First of all, I have a 2.0ghz Dual G5 with two 23"monitors, within the G5 is 2 DSP protools cards, a LaCie external dvd-rw drive, and a 260G external LaCie harddrive. This is pretty much the load.
Anyway,
I left it for a couple of hours, came back to it and the fans were blowing noticeably hard with the screen blank. I gave it a hard shutdown. Powered it back up and the most I got from it was white screens with the apple logo...but no "booting wheel" rolling to indicate it's booting. Rebooted it several times and I either get that reaction or it's just completely blank...but either way, if it sits for a couple of minutes the fans blow unnaturally hard. The only other things I've done is reset the SMU.
That is where my knowledge ends. Can anyone PLEASE PLEASE help me?
Is this going to be a big costly fix or is it something simple?

Ok...I've tried a couple of things.
I looked up the verbose and single modes, booted up in both...and they both give me the same thing...black screen with several lines of text. The bottom line reads DART enabled. Don't know what that's about but I can't do anything while in that screen...other than shut it down. No functions work.
While trying to boot it up a couple of times, it immediately powered down as if someone pulled the power cord. That is definitely something that is raising a red flag.
But for the most part, it's doing the same thing. I even put my original install disk in the dvd rom and it doesn't boot from there.
I'm flipping out at this point because I hope to God that nothing's fried...especially when I did nothing but leave it idle.
Anything else anyone?

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MacBook pro will not boot up. Blank screen with message File is possibly corrupted. Checksum does not match etc

MacBook Pro suddenly will not boot up. Blank screen with message File is possibly corrupt. Header checksum does not match, etc

Hi s.cheslik,
It seems your MacBook Pro will not boot properly and it displaying an error message. Based on the information you have provided, it appears your MacBook Pro needs to be serviced. The following link should help you get started with the process and has links with additional information on topics such as warranty and service pricing, battery replacement, and express replacement service.
Apple - Support - Service Answer Center
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Some things to try first:
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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
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http://www.theipadfan.com/workaround-ipad-wifi-issues/
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Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
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If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
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HP Pavilion Elite m9258 will not boot up. Won't recognise USB ports -mouse keys etc

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panjok2 wrote:
I am having the same problem as Avro500! My computer is the hp pavillon desktop model a6863w. The computer freezes then the keyboard and mouse will not respond and the only thing I can do is shut it down and even then I have to hold the pwer button about 10 sec before it shuts off! I have unplugged all external devices like you told avro500 to do and I did finally get it started but the computer still freezes and it is doing it more often as time goes by! I even paid HP support the $100 dollars (or around that amount) to fix it but it keep happening even after they worked on it but it was after the 7 days or what ever their policy is! They downloaded some security suites and ran their scans! They left Advanced system care, ccleaner and superantispyware on my computer and I was just wondering if they could be conflicting with my paid norton internet security? I have become very flustrated because first off I paid a lot of money for this computer and it's not even 2 years old yet and I also have paid HP a lot of money to fix it and all the guy from India could say to me was "I have been working on this computer and it hasn't froze up so the problem must be fixed!" Well it's not!! and I don't know enough to fix it myself so thats why I paid you a hundred dollars to do it for me! haha thanks for any help!
you have a different model PC. Don't be a thread hijacker. Start your own thread.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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G5 suddenly will not boot up.

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