Brought my daughter's iphone 4s in because she dropped it and the back cracked. Took it here to see if they could fix it. They called in 2 hrs saying that the they tried to charge it but they couldn't even turn it on and the assumed the logic board was messed up. When I came to get it they explained the same thing over again and the female manager said the logic board was 200 something dollars.
This is an old iPhone so no warranty. I looked online and it says to hold home key and off button for 10 to 15 seconds. I did just that and it turned on. I would recommended this place for battery repair only NOT iphone repair such as glass screens.