SNOW iMAC DV 500 mHz won't start

I upgraded to 4.1.9 and installed 10.4.6 so I could run new software.
Worked fine until several Power failures by Edison this week. Now will not restart from the button on front; not even a tone; just a click and flash of light sometimes.
Acts like a latching relay isn't pulling in. I changed to new 3.6 v 1/2 AA battery; zapped all the things listed and still not even a flicker from the screen; sound from the drive; etc.
thanks for help
mike

WHAT DOES THIS MEAN?
I ASKED FOR HELP; A QUESTION TO THE FORUM.. WHY WOULD I ""UN MARK"" IT IN THE FIRST 15 MINUTES ??
SO CONFUSED IN CALIFORNIA....
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If you can't boot in the usual way, try a safe boot. During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. If you have more than one user account, you must be logged in as an administrator to carry out these instructions. Safe mode is slower than normal, and some things won’t work at all. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the startup volume is on a software RAID, you can’t boot in safe mode. If you're able to boot, launch the Console application in any of the following ways: ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.) ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens. ☞ Open LaunchPad. Click Utilities, then Console in the icon grid. Select the most recent panic report (with a name that begins with "Kernel" and ends in ".panic") under the heading System Diagnostic Reports on the left. If you don't see that heading, select
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I'm not sure I understand your response, but the machine has a hardware fault. Make a "Genius" appointment at an Apple Store to have it tested.
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Hi Tim,
first of all: WELCOME TO THE DISCUSSIONS!
Do you use the software restore disks that came with this computer or do you use disks that shipped with a different model? Be aware that the software install&restore disks are hardware specific and cannot be used with a different model then the one they originally shipped with.
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If this answered your question please consider granting some stars: Why reward points?

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