6680 wet unit w/ weak signal
 

Good day every1, i have a 6680 unit which got wet and my client dried it w/ hair dryer. The next day, he tried to power on and it works, BUT the signal is very weak. The signal in the area is supposed to be very good, full bars on other units, but his only gets 1-2 bars. pls what should i check first? hope some one can help!:)