Problem : Micromax Funbook P300 boots and hangs with white bright screen.
Solution : make Factory Default
1.Shut down your phone.
2:Press Volume up button, Menu button and Power on button at same time and hold up for 10 secs. Your phone will start and a screen appears with the android sign and after some time few options
3:Use your volume button for scrolling.
4:Select factory reset option using the power button.It will reset your tab.
5:Now select reboot option or restart your tab.
Note: Factory reset will erase all data except on the SD card. This takes the tab to the state when you unpacked it.