SONY HDD 60gb DCRSR72 Startup problem -Help Please

I have sony 60Gb HDD since 1yr, no problem using this.but last friday one of my friend after shoot he kept it on Standby about 6 hrs, after that i tried to power up but failed, put to charge all night. but never power up, i tested my battery with other camcorder which is allright.

My warranty is over , what to do please advice.

Chandra