my BLACKBERRY DON'T TURN ON

I have a big problem with my Blackberry 8900 Curve this morning, it will not turn on,I didn't find any soulution for my BB I put it in charge 5 hours but he didn't turn on , I tryed with USB cabel and he didn't turn on also ,for the red led in the first he work but when I put it in the PC he flaching 3 times or 4 times and nothing it's happened ,and for your information my battery has life been short lately , and I didn't put it in the high humidity also I didn't try with other battery. this problem is happened yesterday night because I forget to put my BB in the charge .
if you could help me, I would be very grateful.
Thank you all