Samsung Glaxy mini (s5570) auto power on and back button malfunction

[thefox]

Samsung Glaxy mini (s5570) auto power on and back button malfunction done...

remove and change the varistor (v500)...
gagana po ang back button pag na remove mo ang varistor...pero auto power on parin ang unit...kaya pinalitan ko ang varistor.... the varistor is "opened" kay nag auto power on at hindi na gumana ang back key.....

for reference po​