Will not start. Clicking but no LED

Hello There.
I have an power mac G5 2.5 duel about 5 years old with 7 Gig of Ram.
the other day I put my mac into sleep mode and about 15 mins later went back into the room and could hear the fans spinning very fast. I tried to bring it back out of sleep mode but it would not do anything, so I shut it down by holding the on button for a few seconds. When I went back in the morning and try to turn it on nothing happened, I turned the power off and back on the computer clicks but no LED light comes on and the computer still does not start. I also disconnected everything removed the battery and held onto the on button for 20 seconds but this sill did not work.
Any Ideas
Many Thanks
Gary

Try pulling out the battery and mains cable for about 4 hours... My Dual G5 does get stuck from time to time, and this does the trick !

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Okay sorry it took forever to respond... But for a while there I gave up on this computer!!!!
Money's been tight lately , so taking it in to a professional was not yet an option... though I did consider it eventhough.
Anyway long story short im glad I didnt spend any money because I already had all the tools necessary to fix this issue but was going about it in the wrong way. Okay so here is my scenario and the breakdown... Though this may not fix the issue for everyone :( which *****... But I know we all will have different circumstances.
Anyway here we go...
Okay so first things first.... Years ago I purchased the OS 10.5.1 disk ... So that has always been in my possession!!!!
I realize that some may not have a disk to reflash your OS to your hard drive... but if you do your in luck.
2ndly ... I had an external harddrive with all of my itunes downloaded music so it was more than okay with me to delete my primary HD because all the important stuff could either be copied over or repathed to be located.
-------If you dont want to read through the whole story the fix is summed up in the bottom section-------
Okay so now the SOLUTION!!!!
By trial and error , and pure boredom I opened up my computer to clean the inside...
AND
"Disconnected the primary HD"
and just because ....... REBOOTED my computer. Just to see what it would do.
Upon restart and though it looked like it would repeat its usual cycle...
About 1 minute in to that process my computer froze for about 2 seconds and flashed to the OS installation screen.
Mind you I havent seen this screen yet... Probably hasnt been since I installed the OS years ago.
After a bit of trial and error...
I decided to tell my computer to startup from the OS 10.5 disk located in my dvd rom drive and restarted once again...
this setting is under
Utilities / startup disk
After a little more trial and error ... I realized that I could reconnect the primary HD , restart the machine and return to the OS installation menu.
So upon this discovery
I went to the Disk Utility located under Utilities
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Once highlighted ...
In the heading section on the right I selected the option
Erase
in which I erased My current OS on my primary HD ...
I used the first option in the list under security... Because it seemed like the least invasive and would take the least amount of time to see if this process would actually work.
I FORGOT to add something...
Another reason why I deleted my primary HD!!!!!
I forgot to say that it WOULD NOT!!!!! Show up in the STARTUP list as an option...Even After multiple reboots....
But like clockwork... Once I deleted its name IT SHOWED UP as an option!!!!
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I returned to the STARTUP option under utilities ... And was then able to see MY primary HD now as a startup option...
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My issue was resolved ... My computer then stated the install was SUCCESSFUL!!!!!!! :))))))))))) lol ;)
It was like I was setting up for the first time ;) asking for my registration info...
The dilemma of deleting the private folder and emptying the trash is finally over resolved. Done ... and no extra money spent!!!!!!!!!
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I know im not the only person who's had this issue , because i've seen numerous posts with similar wording.
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Once selected
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In that case restart again.
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In the left column select and
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Then towards the top portion / center of the page
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I USED THE FIRST OPTION
"Dont erase data"...
*click OK
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Once erased which should take a few seconds
*Cancel the disk utility...
* Click Utilities / startup
And your newly erased HD should now appear in the list.
* Select your drive from the list by highlighting
It should no longer have a name.
*Once selected, you will then be prompted to restart and install the OS to your newly erased HD...
Thats it!!!!
Once everything reinstalls re-add your personal info or registration info and you are up and running.
Goodluck ;)

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== 5/19/2010 ==
== User Agent ==
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Will not start. Clicking but no LED

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