Experia C3 dual

[Nhlanhla]

Hi everyone I bought the Sony xperia c3 dual about 3 days ago. i switched it off last night to charge it and this morning i woke up switched it on and the screen keeps flashing. this has been happening for the past 3 hours. Please advise Thank you

[Hampus]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

How do you mean that it's flashing? Does the phone not boot correctly? I suggest that you perform a software repair on your phone via PC Companion:
http://support.sonymobile.com/global-en/tools/pc-companion/

In PC Companion you press start on Support Zone > Start on Update the phone/tablet software > Repair phone/tablet (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.

Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.

[Nhlanhla]

flashing screen meant as blinking screen

[Hampus]

You should try this software repair that I mentioned in my earlier post. Also make sure that your phone is powered off when doing this. You can force a shut down to make sure that the phone is off:
http://support.sonymobile.com/global-en/xperiac3dual/userguide/Resetting-your-device/