Problem with Sony Ericsson T715! Won't turn on - gets stuck on logo?

imported_o_o

New member
I bought my T715 just a few months ago, earlier this year. Since yesterday after my battery went flat (i have fully recharged it since) I was not able to turn my phone on successfully - it gets stuck on the Sony Ericsson logo start up screen and i cannot turn it off without removing the batteries. If the sim card is taken out, it will start up and turn off but you can't use SE phones (except view the Demo video over and over again...) without it. I have confirmed my battery, memory card, charger or sim card is not faulty. I don't think i'll be able to get it repaired under warranty as I'm not too clear on where my proof of purchase went. Do you guys know of any solutions? If not, approximately how much would it cost to repair?
How do i restart my phone?
@roan - i have tried phone repair (with PC suite) twice and update service twice as well. the update seems to be successful but it will not turn on properly. Sometimes, the logo problem, sometimes it turns on to see the phone mode/inflight mode and maybe the PIN number screen, ONCE it went all the way to the start up screen (although everything looked weird) but it froze and turned itself off after a few seconds.
 
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