dive housing leaked in water? now is not responding?

while diving the housing leaked water. After the dive I dried ti out and changed battery, back screen, and SD card. Since then when tried to power it on the red LED above the back screen connection port flashed. the LED screen on the front displayed worked. since then I get nothing. Is there a repair guide online where I can get some clue about where ti=o start? Is there some tech support for this issue, GoPro seemed to be no help?