G5 Power PC startup problem

[srowndedbyh2o]

I’ve got an old Power PC G5 iMac, and this is the screen I've started getting when I try to start up the computer.
Any ideas?

 

[Davy.Shalom]

It's a poltergeist

 

[Detrius]

If you're not up for this, then it's time to start looking at new computers.

 

[srowndedbyh2o]

Detrius, thank you so much for the link! The most I’ve ever attempted is to add more RAM to my computer, so this is going to be a real challenge! But hey, I don’t have a working computer now, so if my attempt fails, nothing lost, only experience gained, and if I’m successful, I’ve saved a lot of money over the cost of another computer. It’s a win win situation!

 

[Detrius]

Of course, verify that you do have blown capacitors before you start trying to replace them. It was very common on those machines, and it did cause graphics problems.

 

[srowndedbyh2o]

After several failed attempts, my computer can now start up in Safe Boot mode, although it takes 10 minutes or so to start up. I can still use the browser, and although video will play just fine, there is no audio. I’ve gone into System Preferences > Sound to make sure the sound is turned on, and each time I do the small speaker icon shows up at the top of the screen, but when I click on it, it disappears. Is audio disabled in Safe Mode, or is there more wrong with my computer than I originally thought