Is their any indication like the red light blinks only? Just do the basic steps first.
* You should try another battery to see if your old one is drain and need to replace a new one if it is working.
* Also try to check your charger,try to test another charger,might your charger is damage due to intermittent wires,improper keeping or rolling the wires so tight.
* You can also test a usb cable and plugging it to the computer,if the pc recognized the phone, either the two above hints need a replacement.
* also try to connect your phone to power supply or usb (connected on computer)without the battery for a minute the plug the battery again and check if the phone initialized.
* Otherwise,you need to update the firmware of your phone,might the software has been corrupted,to do this method,follow my TIP here on how to flash or update your phone firmware
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