G4 MDD, EM "Startup Disk is Full, cannot restart"

Hello, all.

So I have a G4 with two hard drives(PowerMac G4(MDD) 2x1.25GHz). I was loading some music via a flash drive and an error message popped up that said, “Startup disk is Full”. I have two hard drives, one is running 10.4.9, the other was running 10.5.6. I was working in the 10.5.6 drive when I received this error message. I decided that since I received this EM and was experiencing other problems with this drive, that I would reformat it back to 10.5 and update it back up. When I put in the install disk and tried to restart, I got the following Error message, “Startup disk is full, cannot restart computer”. I tried a couple of times and cleared most of the junk off of my desktop, but still had the EM.

So I figured since I have two drives, I would manually turn off the computer and restart it in target mode to load the 10.4.9 drive.

With the install disk in the computer, I turned off the computer, and guess what….now it won’t turn back on! So apparently, the EM(“Startup disk is full, cannot restart computer”) was true and now my Mac won’t even turn on.

Colour me dumb, but I was hoping that someone may have run into this before and might know of a fix to get it back on. So at least I can manage the damage.

I started searching through the archives and found that I may be able to turn it back on, with another Mac(Kinda like a Jump start), but I am not familiar with the process.

Has anyone ever experienced something like this? Does anyone have a suggestions on how to proceed?

Any help is appreciated.