Questions About Broken U2 Special Edition 20gb iPod

I have a U2 Special Edition 20gb iPod that has been broken since about 2009. I would like to try to fix it. It shows the sad face icon when I try to turn it on. When it is charging with an off brand cable, it will show a charging battery icon and then switch back to the sad face. However, when I charge it with a Fire Wire cable, it will cycle between the Apple logo, the sad face icon, and then show a battery icon with an exclamation point (like the one in the sad face icon), then back to the Apple logo to restart the cycle.

I would like to update the hard drive 128 ssd, but before I do, is there anything that I should try first to see if I can make it work.

Thanks,

Scott Eaton