Imac G5 screen gone blue

Hi,
I have a G5 Imac and just today out of the blue (no pun intended) the screen has gone to having a bluish tint. Turned it off and back on, tried some different programs, same blue tint. I found the "Video and Power issue recall", or whatever the repair is being called and my serial number is listed. Does anyone have any experience with this, and does this problem possibly explain the blue screen?
tia,
E

You could try the following first, but a repair may be required.
iMac G5: Fails to startup (From an article at MacFixit)
Some users are reporting an issue where iMac G5s fail to properly startup -- apparently at a hardware level -- never reaching the Mac OS X startup splash screen (Apple logo with a spinning progress indicator).
Note that in cases where the system does reach the Mac OS X startup splash screen or further progression but stalls, software issues may be to blame.
Potential fixes
Disconnect external devices External devices -- especially those that draw power from the system -- can cause issues with startup that manifest either at the beginning of or later in the boot process. Try temporarily any external FireWire or USB devices then re-attempt startup and check for persistence of the issue.
Reset SMU Although this workaround was not successful in Connors' case, resetting the iMac G5's SMU (system management unit) as described in Apple Knowledge Base article #301733 can resolve a variety of power-related problems, including sudden-onset startup failure.
Check power cables Check your power cord for a loose connection. As noted in the aforementioned reader case, unplugging and re-plugging the power cord can sometimes result in a successful startup -- likely the result of a more snug fit.
Also, power cables can become defective or ship in such a state.
Try exchanging the power cable from a problematic machine with a system that starts up properly to eliminate this as a potential cause.

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When using my iMac the screen turned blue and so I turned the compute off. When I turn on again power does get to the computer but there are no chimes and the screen remains black. Any advise please. David

Hello DJJOC,
Thanks for using Apple Support Communities.
To start troubleshooting this issue where your iMac's screen will not illuminate, please reset your SMC by following the information outlined below.
Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Note: For Intel-based Xserve computers that are not responding, you can shut down locally, or by using remote commands, or by pressing and holding the power button for five seconds.
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
Take care,
Alex H.

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Make an appointment at your local apple store and have them take a look at it.
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If none of that helps try this...
Safe Boot , (holding Shift key down at bootup), use Disk Utility from there to Repair Permissions, test if things work OK in Safe Mode.
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/Users/YourUserName/Library/Preferences/com.apple.finder.plist
/Users/YourUserName/Library/Preferences/com.apple.systempreferences.plist
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You could try the following first, but a repair may be required.
iMac G5: Fails to startup (From an article at MacFixit)
Some users are reporting an issue where iMac G5s fail to properly startup -- apparently at a hardware level -- never reaching the Mac OS X startup splash screen (Apple logo with a spinning progress indicator).
Note that in cases where the system does reach the Mac OS X startup splash screen or further progression but stalls, software issues may be to blame.
Potential fixes
Disconnect external devices External devices -- especially those that draw power from the system -- can cause issues with startup that manifest either at the beginning of or later in the boot process. Try temporarily any external FireWire or USB devices then re-attempt startup and check for persistence of the issue.
Reset SMU Although this workaround was not successful in Connors' case, resetting the iMac G5's SMU (system management unit) as described in Apple Knowledge Base article #301733 can resolve a variety of power-related problems, including sudden-onset startup failure.
Check power cables Check your power cord for a loose connection. As noted in the aforementioned reader case, unplugging and re-plugging the power cord can sometimes result in a successful startup -- likely the result of a more snug fit.
Also, power cables can become defective or ship in such a state.
Try exchanging the power cable from a problematic machine with a system that starts up properly to eliminate this as a potential cause.

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