Trying to connect two iMacs through Target Disk Mode

2008 iMac has: USB, FireWire, and Ethernet.
2014 iMac has: USB, Thunderbolt, and Ethernet.

My 2008 iMac video card kicked the bucket, so I got a FireWire 800 Cable with 6-Pin Adapter, and an Apple Thunderbolt to FireWire Adapter, and connected them. I put the old iMac in target mode, but it doesn't show up in my new iMac. Disk Utility also doesn't register it.

Is it even possible to use a thunderbolt/firewire adapter to put the display-less iMac 2008 into target disk mode, or is there any way to use Ethernet or USB to connect them?

Just the video card if this is what it looks like when it dies: https://forums.macrumors.com/posts/20361483/

Weaselboy said:

So you just want to get some data off the drive in there now is all?

I was unclear from your post if single user mode worked?

Click to expand...

Single user mode does work except for looking like it looks in the images. I also had every thing backed-up on another hard drive. I'm just trying to get in my iMac to get my iTunes settings transferred over, which I couldn't find in the back-up hard-drive, to get my playlist moved over. I think I would need to get the old iMac to show up to my new iMac hard drive, and then go in to the directory and copy it to my new iMac.

Edit two days later: Got it connected. I'm not sure if it just wasn't connected good enough or what!