G3 AIO Start up problems.

Ok so here's the issue, i've got a G3 AIO that has started giving me problems. I changed out the hard drive to a bigger one, a whole 6 Gb. and now none of the drives work. The CD-Rom won't even open/close. The grey screen comes up and has the ol flashing folder. Oh and the mouse will move the cursor around. That's it, that's all it does. Any ideas? Oh yea, i've changed the mother board, battery, personality card and still no luck. Thanks in advance for any tips.

THanks for the note, i've got the jumper off of the HD and set to master on the CD-Rom , just like it was when it was actually working. The new hard drive needs to be formatted but I can't load the CD as the CD-Rom isn't working. I've tried all different combinations of jumpers but nothing seems to change. Also, I've tried a floppy disk with the drive setup 1.7 something and it just spits it out. Any ideas?

UGH! Still having no luck with this system, think the open reset will work? Apple-option-O-F?

Thanks