d2203 problem with flex volume and power

Hello .i change the physical button and the flex cable and phone says safe mode .Al so I went out insurance which means that the volume button was less blocked .ichange flex with a new one but now there are volume buttons .The phone has hit so if something is not solder or simply the antennas do not touch the power button flex.El doing well but now do not work volume boton .some suggestions ?
Thank you