phone not switching on after switching off

[horizon1]

hi,

i brought  xperia j 6 monts ago and now iam facing problem with the phone.the phone is good but when i switched it off it doesnot switches on and after long time it switches on but the touch doesn't work.pls give a solution

[Uliwooly]

Connect your phone to a wall charger > press and hold power & volume up for 5 seconds > let it charge for 1hour > after 1 hour try to repair it with SUS or PCC

Don't forget to give Kudos

[Uliwooly]

Update Service (SUS)

http://www.sonymobile.com/gb/tools/update-service/

http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

Don't forget the Kudos 

[shihstouch]

Have you tried this?

There are a few things you should try first when you experience problems with your device:

• 
  Restart

  Restart your phone to turn off all running applications and to remove memory blocks. Remove and reinsert the battery and the SIM card. Then restart your phone.

• 
  Update

  Update your phone to ensure that you have optimal performance and the latest enhancements. Read more about how to update and find latest software version.

• 
  Reset

  Reset your phone to its original settings to remove memory blocks: Settings > Backup & reset > Factory data reset > Reset phone Don't forget to back up any important data saved on your phone!

[Xperia_J_user]

I also had the same problem with my Sony Xperia J.

When I tried to charge battery, red light was blinking..not charging after 1 hrs also.

After trying for many times....finally after 4-5 tries mobile started....