IMac (Intel) :: No Apple Logo Appears During Startup

Aug 28, 2014

I am fixing this 2007 iMac for free for an autistic child. Apparently, changing computers for someone that is autistic isn't ideal. I don't have the history with this iMac, just that it isn't working. They supposedly did have the hard drive replaced? It sounds like a dvd is inside it when it starts up, could be the installation dvd?Either way, I have not seen it before where the Apple logo refuses to show on the start up screen. It just stays gray.  

1. I've tried zapping the PRAM. Didn't have any changes. 

2. I tried starting up in safe mode, but getting passed the apple logo is required for that 

3. I tried single user mode, but getting passed the apple logo is required for that 

4. I tried holding the c key to start up off of the dvd, nothing happens 

5. I tried holding the mouse button (and cmd, opt, f, o) to manually eject the dvd during start-up. 

Info:
iMac, Mac OS X (10.6.8)

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Info:
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Following some advice I found in this forum I got out my old OS disks to boot from the disc instead of the hard drive. I intended to archive the old hard drive and install my latest OS (10.4.6 on the disc, 10.4.11 was the version I had been running on the machine, I believe). The machine told me it needed 4.5 Gb to install 10.4.6 Tiger, but I only had 4.0 Gb left on the hard drive. So instead, I archived and installed with the OS that came with the computer originally, 10.3.4.

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