HDD or Logic Board Disaster?

I was working on both a G4 15" 1.5MHz display problem and re assembling a G4 15" 1.25 MHz. As I was whooping around the room, because changing the display on the 1.5MHz worked, I didn't notice my "little helper" around the table.

I only had one HDD cable so I had to switch out the one drive between the two. I took it out of the 1.25 which was working perfectly and put it into the the 1.5.

The tone beebed, yeah, the display lit up, yeah two, and then the folder with the question mark came up. I was dumbfounded!

I tried it again with the same results so I put the drive back in the 1.25, BUT now I got the same results with this powerbook. What in heavens name was going on?!

I just couldn't figure it out so I removed the hdd and turned off both powerbooks and decided to call it a night and start fresh in the morning.

The next morning when I picked up the hdd to start again I saw a very small, all metal, screwdriver fall to the table. My "helper" decided the powerbook needed the screwdriver to "fix it up" and had dropped it into the hdd section on the logic board and I hadn't seen it!

Now both powerbooks still start up and go to the start up screen, but only go as far as the folder with the question mark. And I can't get either to go into TDM.

If I use the option key the arrow and circle show up but no hdd. I tried another hdd that I know works, but again neither powerbook recognizes it.

So is there anything I can do or do I now just have two very, now not valuable!, paper weights?

Any help will be greatly appreciated!

Thanks! MackDog