All of a sudden I start up my iMac G5 and there a folder with a blinking question mark and is there any cheap and easy way on just rebooting the whole computer.
Please help
Thanks
The folder with a blinking question mark means that there was no boot drive found.
Try pressing and holding the alt/option key after turning it on. All available boot drives should be displayed. If none is shown, your internal hard drive is probably dead.
If your internal drive is displayed, click it and it should boot. Then go to Apple Menu --> System Preferences --> Start Volume and make sure it is selected. This way it should be found on startup automatically.
If you want to replace the internal drive, it depends on which model iMac G5 you have whether you need to get a 3.5" PATA or SATA drive.