When troubleshooting, make sure you disconnect all devices from your computer except for the keyboard & mouse.
"when i put a startup disc in there and hold down c it goes to a screen saying i need to restart my computer and gives other kernal and darwin messages."
You experienced a kernal panic. Check out the following:
http://docs.info.apple.com/article.html?artnum=106805 Mac OS X: "Broken folder" icon, prohibitory sign, or kernel panic when computer starts
User Tips: Kernel Panics
"it looks like a blue happy face in a folder and a question mark."
See the following Article:
http://docs.info.apple.com/article.html?artnum=31355 Mac OS: Flashing Globe When Computer Turns On or *A folder that has an alternating flashing question mark*
"the boot up disk is now stuck in my mac."
See the following Articles:
http://docs.info.apple.com/article.html?artnum=58566 iMac (Slot Loading): Troubleshooting CD/DVD Eject Failures
http://docs.info.apple.com/article.html?artnum=106752 Macintosh: How to Eject a Disc When Other Options Do Not Work
"i had visited a genius bar with this computer and both times had some good and some bad."
Reasoning for not fixing your computer?
Which
"model" &
"generation" G5 iMac do you have?
Need this info so that the knowledgeable users can provide you with the
proper troubleshooting solution(s).
http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer
You can have this info displayed on the bottom of every post by going to
'My Settings' which is located in the column on the right under your name, and filling in the information asked for.
Thank you
After your issues are cleared up, you need to consider updating your OS to OS 10.4.11. Your system info confirms you are still using the outdated version-OS 10.4.6.
