My Power Mac G5 Late 2005 not booting up

I was not using it for a long time , when i booted up it went on and i got some updates too, and i did allow the update to run, but in the middle of the updation, it got stuck and i got force restart message, i did the force restart, from then when i switch the power on its showing apple logo then automatically turns power off completely. Is there any way to fix this so i can re use the computer .Please help.

Thanks,regards.

Praise, Dubai,UAE.

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What diagnostic lights are you getting?

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Thanks mayer! jst getting the white light only.

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Does it change when you press the power on button?

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