My Samsung Galaxy trend plus wifi wont turn on
Do you have applied any update(custom or OTA) ?
Custom: If you have upgraded your ROM before official release, high possibilites are there to face these type of problems.
OTA: Very rare but possible if your manufacturer provides an OTA and this problem is occurring after updation of device.
Solution:
• If you think it is occuring after update, you should degrade your Firmware version by custom ROM.
You have not updated device since a long time ?
In this case high possibilites of facing such problems.
Solution is please go to nearby custmore care or look for OTA update in you handset Software Update section which falls under About Phone .
[If your device is out of warranty and don't want to spend bucks on it now, please upgrade by custom ROM.