im running liberty 1.5 and at times when i hit the home button it takes a bit for the screen to light up and other times it wont do it at all and i have to pull the battery. on top of that some times it wont light up and it will just reboot on its own. i can see the screen if i hold it just right but its really faint. so it just seems like its not operating the backlight at times and locking up when it does it. thoughts solutions?