[G4] Panic after OSX 10.3 install; Can't open disk drive

[Rick Barrett]

Hi G4 Gurus,

I sure need some help.

Just got a 15" flat panel G4 iMac (Codename Tessera, P80) that had OS  
10.2 on it, but lacked system or dock prefs!

Mactracker says this 800 MHz model shipped with a CD-RW/DVD-R  
"SuperDrive", but when I put my OS X10.4 install DVD in it it didn't  
spin up, but ejected it after a few seconds, so I then decided to  
install 10.3 and worry about the drive later.

I ran disk one of the OSX 10.3 Install and all looked good through  
"Optimizing System Performance" until suddenly I ended up with the  
dreaded:

panic (cpu 0) Unable to find driver for this platform.
backtrace 0x008c2f4	0x0002a7a0	0x001f2204	0x001d4c5c	0x001d56cc	 
0x001d5d6c	0x00037430	0x00037364
No debugger configured -- dumping debug information
version string : Darwin Kernel Version 1.3
Thu Mar 1 06:54:40 PST 2001: root :xnu/xnu-123.5.obj~1/RELEASE_PPC
DBAT0: 00000000	00000000
DBAT1: 00000000	00000000
DBAT2: 80001FFE	8000003A
DBAT3: 90001FFE	9000003A
MSR=00001030
backtrace: 0x0008c420	0x0002a7a0	 0x001001f2204	0x00104e4c	0x00104e4c	 
0x001d56cc	0x001d5d6c	0x001c621c	0x00037430	0x00037364
panic: We are hanging here...

(Ever hopeful, I tried the install twice, same results, now I'm stuck.

Not only that, I can't restart on any  disk except the 10.3 install  
CD (which just eventually gets me back to the panic) and can't open  
the disk drive (no paperclip hole like every other Mac i've ever  
had), mouse button down on restart doesn't work, F12 doesn't work!
What now???

Rick in 998133