server 2000 only starts in safe mode

my windows 2000 server only starts in safe mode. when i
try to start in any other mode, i can only get to the
screen just before it asks you to press ctrl-alt-del to
logon. at this screen it shows some strange characters
instead of the usual”windows is starting up”
and “preparing your network connections”, then the pc
restarts by itself. can anyone help with this?
.i already tried re-installing windows 2000