Homebutton and powerbutton not working

as several other iphone 5's, my powerbutton started to get bad. suddenly it stopped working at all. Out of real curiosity i opned my phone to try to fix the button. (see if it just needed a cleaning). when i was done, didn't just the powerbutton not work, but also my homebutton. i've read some answers on other quetions. they told me that i needed to bride two copper things with a screwdriver, but it didnt acivate the button.

What can i do to try to fix the two buttons?