Chosen Solution

Hello! Customer came in with he’s Sony Xperia Z1 Compact where the power button was not working and the volume buttons was barely working. So i told him i will order the flex cable part and get it fixed. When i opened the phone i first checked if all that was needed was just to attach the plastic bit holding the flex cable into place a litle more. But still didn’t work. So i went ahead and changed the flex cable. After the change, the button still won’t work. I checked and double checked my work and all seems normall. I also tried changing the button flex cable again. Now the phone won’t turn on and the buttons are not working. Most important is to get the phone on without losing any files. Anyone have any ideas, suggestions or solutions? it would be most greatfull.

@captaintech I’d start off by using Sony’s suggestions. 1.1 Power 1.1.1 Will not power on or will switch off randomly Check: Check whether the phone vibrates by pressing the on/off key. Action:

  1. If activation of the vibrator is detected, refer to section 1.4 ‘Display’.
  2. If NO activation of the Vibrator is detected, check that the battery is charging when connected to a charger and do a HW master reset. Follow 1281-3374 Test Instruction - mechanical chapter 2.3.7 (Charging via USB and Easy Charger), Diagnostic Battery / Charging status. Check: Inspect the on/off key. Action: Refer to section 1.2.3 ‘On/Off Key’. Check: Inspect the BtB connector of the Battery to Main PBA.

Action:

  1. If not properly connected – disconnect and reconnect it.
  2. If dirty or oxidized – clean the both sides of the BtB connector.
  3. If the BtB connector, the Battery FPC or the Battery is damaged – replace the Battery.
  4. Replace Main PBA. 1.2.3 On/Off Key Check: Inspect the external area of the On/Off Key. Action: If dirty – clean it. Check: Inspect the BtB connector of FPC Side Key to Main PBA. Action:
  5. If not properly connected – disconnect and reconnect it.
  6. If dirty or oxidized – clean it.
  7. If the FPC of FPC Side Key is damaged – replace the FPC Side Key
  8. Replace Main PBA. Check: Inspect the area and position of the FPC Side Key (Power On/Off) (a) and On/Off Key (b).

Action:

  1. If dirty – clean them.
  2. If the On/Off Key is damaged – replace the Frame Main Assy.
  3. If the FPC of FPC Side Key is damaged – replace the FPC Side Key. You can also check a few other things like this one

R1304 is a 0.01 Ohm +/-1% 200.0 mW Resistor

Open the sim card tray you’ll find small red button besides tray press it using pen tip till handset vibrate. Now your phone will be turn on without losing your files.