My Power Mac G5 goes into the power sving mode on the start up and screen stays blank. Monitor is OK. Help.....

I Hv a Power Mac G5. s soon as I power it on, the monitor (Lacie) screen flashes a message saying It has gone into Power Saving mode and the screen stays blank.
Once it happened before and was told to keep Command, option, P & R kes pressed while it is starting up and to keep it pressed untill it restarts. Tried that, but it does not work.
How do I correct it?
Please help.....
I am located in India. and trying to exhaust all available options before I contact Apple Support......

It sounds like your video card is not coming up, as the monitor is indicating that it probably has no active video coming from the computer.
Two things to try:
First, does video come up in safe boot (hold the shift key down while powering up)?
Second, how old is the PRAM backup battery? While not a universal cause of video not coming up, we have seen reports of a weak PRAM backup battery being the cause of that failure. If the battery is more than a couple of years old, a replacement is a good and relatively inexpensive initial troubleshooting step. (My own theory is that at boot, the PRAM yields garbage data to the system which, in some cases, crashes a video driver or does other mischief.)
If the computer is otherwise coming up OK, that is to say, you power it up and it hasn't clicked itself off and after a few minutes the fans haven't ramped into high gear, which indicates that the system is actually up and running even without video output, then it is relatively likeley that the video card has failed and must be replaced.
One final thing to try would be a PMU or SMU reset (depending on where your G5 is in the progression of the model). Information on PMU is here and information on SMU is here.

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My Power Mac G5 goes into the power sving mode on the start up and screen stays blank. Monitor is OK. Help.....

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