My 1999 Gtp will not start, no power at all.. Switched out battery and checked fuses with no luck. Was running fine with the exception of approx. a week ago I went to start my car and noticed my clock was reset and reading 1:00 but my radio presets were still working..then today I go to start it and you hear one ding of power and then nothing. Unsure of what it could be, hoping its not electrical, any ideas? Thanks