I left it charging overnight, and today it will not switch on. I have many precious pictures of my daughter that have not yet been backed up. So am very anxious about being able to charge it soon/fix it so i can back these up asap.
Try re-installing the battery and see if it works after.
Also, if it helps, I once tried using my phone without a battery, I just plugged in the charger to turn it on without battery. Do it at your own risk.