/sbin/loader problems during install

[Mike]

Howdy All,
I've got a Power Mac 5400/120 with 134Meg of memory and a 6Gig Hdisd,
w/ 8x CDROM.  Nice box for YDL, or so i hope.. the install locks when it
begins execution of /sbin/loader, the cursor blinks about 5 times and 
freezes.
About 5 lines above this one, there is a message about no default tty found.
If you have any ideas to try, please feel free to share them.
Sincerely
Mike Green