Can't turn on my Xperia Arc S

[#1]

Last week i travelled home by car. My arc s was in my bag. the weather was warm it was about 30 degrees. when i arrived home i noticed that my phone turned off. i tried to turn on but nothing happened. i take off the back than removed the battery. There were little water drops under the battery. i didn't have any drink or water in my bag so i don't understand what happened. when i connect my phone to my pc with usb i get a message that my pc couldn't recognise my device. Is it possible that something switched off in my phone and i could switch it back manualy somewhere under the back of the phone? or could i reset it or something? If i bring it back to the mobile shop will they repair it or give me another 1? i used my phone as i read in the guide so it's not my fault that my phone gave up.

[Nabeel]

You too

Al the best

[Adil1341]

hey...I have the same prb.....but ma phone was not on water...I tried to updatema phone by UPdate servie center software...After downloading the firmwawre when it started to install it complitaed only 10 percent and goes off........then i tried again but this time ma phone is not recognized by ma pc when i plug in usb cable....and ma phone is not starting...i tried to flash but the usb port is not recognized by ma pc....when i tried to on ma phone only the red light beeps and no display on ma pahone.........plz someone help mee

[NicholasKs]

Do it as follow >> PCC > SUPPORT ZONE> SOFTWARE UPDATE> REPAIR SOFTWARE (written with blue) 

PC Companion http://www.sonymobile.com/global-en/tools/pc-companion/

During this step, due to the phone keeps restarting, the Phone just cannot connect to the PCC, thus PCC cannot perform software updates, what should i do? my phone is Xperia Arc S..............