you need to do factory reset

i think its faulty replacing will do the job. go to your nearest device repair shop at your place. thanks

go to settings > application manager > find your keyboard app to the download section if its is downloaded thru play store but if your keyboard is system app check it to running section and press your keyboard app then you will be directed to keyboard setting and the press the clear data button on your screen then reboot your phone if necessary.. thanks.

its to risky if you replace it on your own sir.. maybe you get to a nearby repair shop for replacing it Sir.

To do a factory data reset, follow these steps: If your phone is on, turn it off. Press and hold the Volume up button and the Power button at the same time until the device turns on. Press the Volume down button to select "Recovery mode." If you need to navigate to the "Recovery mode" option, use the Volume up button to move the arrow and the Volume down button to select it. You’ll see an image of an Android robot with a red exclamation mark and the words "No command." While holding down the Power button, press the Volume up button and release it. Use the volume buttons to scroll to "wipe data/factory reset" and press the Power button to select it. Scroll down to "Yes - erase all user data" and press the Power button to select it. are you sure you get it right? choose factory data reset when you are in recovery mode push power button for 10 - 15 seconds to shut it off totally. then doo the recovery mode factory data reset(power button+volume button)

your volume button is grounded you should replace its ribbon (volume ribbon) to replace the malfunctioning one. get it at gadgets repair shops and get it replace there or if you know how to solder it and disassembling your phone you buy the parts you need and replace it on your own

dont just choose reboot choose factory data reset sadly your important files will erase but your phone will work

if you have a built-in battery you just push power button for 10-15 seconds to turn it off or shut it down..

Why would you want to do a Factory Reset? Malfunctioning device (resetting the phone to original settings may fix numerous issues) Wipe personal data off before selling Returning it to manufacturer or retailer and want all personal data removed What to do before you do a Factory Reset? Backup any important files to your PC or external storage Make sure your contacts are synced with your Gmail account Write down a list of apps you may want to reinstall Step-by-Step Instructions: From the home screen, click the MENU button Click on SETTINGS Select the “SD & Phone Storage” option Click on “Factory data reset” located at the bottom Final Warning: This next step will wipe all the data off of your device. You are also given the option to check mark whether you want to wipe all data from the SD card. Click on “Reset Phone” to finalize the Factory Reset Done! another option To do a factory data reset, follow these steps: If your phone is on, turn it off. Press and hold the Volume up button and the Power button at...

when it powered off push volume down + power button then wait for android robot appear then choose factory data reset. if vol down+powerbutton do not work the next option is volume up+power button if theres lying android with a triangle just push the power buttoon to see the options then choose factory data reset by highlighting it with volume buttons you read the instructions above the options showed to know how to highlight and choose a option below hope it will work ^_^