HC-05 module stops blinking

I am building car controlled by arduino uno and i chose to control it by bluetooth.
I connect the bluetooth as follow: 5v to VCC, ground to ground, TX -> Rx and Rx to Tx. All worked fine and i managed to play with the car for 3 days. Today the bluetooth led doesn't flash anymore.
If i leave it alone for 10 minutes, it will start to flash for 5-10 seconds, than shut itself off.
Is there anything i can do?

It was the battery that was drained, and wasn't providing enough power. Sorry!