HTC One X Does not charge or turn on
This is awfully strange if you did not root your device - because normally, these are symptoms of a bricked device.

If you can get into recovery, please could you erase your data? You can attempt to get into recovery by holding the recovery key combo (minus the power button), and then plugging the charger in.

If this doesn't work - after erasing your data, then I would suggest taking it to a repair shop - you never rooted it, so your warranty is therefore still intact.