Xperia S doesn't turn on

[TedWilliams]

Hi, first i want to appologize for my bad english . I have a sony xperia s lt26i and it won't turn on. 1 Mount ago it felt in water, i dissasambed it, clean everything and bought a new battery, i charged it and i tried to switch it on sometimes comes the Sony logo and it just goes back off. and sometimes nothing happens... I updated it with Sony PC Companion and now does not ever vibrate when i push the power and volume. When i connect it to pc is recognised and the red LED is on but after 10-20 minutes it goes off. So please if someone has an idea about what can be wrong with it is welcome to reply. Thank you.

[Thommo · Accepted solution]

If when you took it apart you didn't remove the heat shields on the board then tried to turn it back on then it's possible you have shorted the board - Water gets trapped under the heat shields - The best way to dry a board is first immerse it in alcohol with the heat shields removed as this disperses the water and dry's quicker than water with slight heat from a hair dryer for example - So I'm thinking you have shorted the board

[TedWilliams]

Thank you for the quick answer. So i should change the mainboard ? 

[Thommo]

Have you tried to run a repair using SUS from here - Simply install and follow the onscreen instructions - If that works but still fails to switch on then consider the screen may be non working check using the HDMI cable if that fails then yes I would consider changing the board or it some circumstances it is sometimes cheaper to buy a 2nd hand phone of the same model on eBay for example

[TedWilliams]

I tried with SUS but i can´t find the Xperia S... 

[TedWilliams]

I can't find the Xperia S with Windows 8.1, tried with windows 7 and it founds it, but now the PC doesn't recognize the Xperia...

[Thommo]

Definitely sounds like the board has shorted - Nothing you can do now unfortunately

[TedWilliams]

I'm looking now to buy one with a broken display on eBay.

Thank you for the answers.