few weeks ago got my xperia SP damage because i got caught in heavy rain.
my phone got into exactly situation as your sister's also,
because i cant shutdown the phone i just let it drain the battery till empty and leave it alone for 4-5 days without charge.
now the phone works without hardware proble, but the error sometimes still come (it just works ok for 1 weeks ago, till 3-4 hours it got into same reboot again)
i notice it works ok on recaf 4.4 ROM (not sure, but when i flash 4.2.2 or 4.3 ROM the reboots always come back) .
if its bootloader unlocked i suggest you flash kernel with recovery ( so if after few days you want to try to turn on the phone but it still reboots u can shut it down from recovery). thats my experience tho, good luck for your sister
and sorry for my english.
Originally Posted by Glenn160
Hi I need a little help
My sister has a xperia sp c5303 that she droped in toilet
Every thing seams ok with the phone just haveing trouble getting the phone to boot up
It truns on and I get both the sony and xperia logos and a little bit after that but then it reboots
I am able to re flash the stock rom useing the pc companion repair your phone
I was able to get the phone to fully boot once but when I truned it off it went back into the loop
I would appreciate any help and advice