my home and task veiw buttions on my Z899VL are not working

[Android Central Question]

i have no idea how this happened i went to bed and woke up later and the home and task buttions dont work ive tried factroy resetting etc nothing good news is though it is accepting my inputs since i used navigation key settings to swap the back and task buttions so its accepting my inputs for back but not task or home and the buttions themselves arnt broken. please help since i dont have the money to get another phone

 

[Rukbat]

Without having the phone to test, it's just an educated guess, but the board on which the buttons are located has gone bad, so it means a trip to the repair shop or doing without the buttons.