For this repair, you will need a Phillips head screwdriver and a replacement set of touch sensors.
First, flip bObi's power switch OFF.
Next, remove bObi's front wheel to access one of the screws holding her together. Turn bObi's front wheel towards her bumper and, using a screwdriver for leverage, grip the wheel firmly and pull it up.
Remove the screw located beneath bObi's wheel.
Detach bObi's dustbin and remove the 2 screws on either side of it.
Remove the 2 triangular corner pieces held down by these screws.
Pull the main brush compartment forward to expose the red fastener behind bObi's main brushes. Remove the 2 smaller screws holding the red fastener in place.
Lift bObi's brush compartment up and out. To detach her brush compartment completely, unplug it from bObi by pulling at the circuit junction.
Remove the 4 screws located beneath bObi's main brushes.
Remove the 2 screws securing the red contact point fastener onto bObi, and pull off the fastener.
Flip bObi back onto her wheels and lift her cover up.
There are 2 circuit plugs which must be removed to separate bObi's cover completely: a yellow-wired circuit plug connected to the left side of bObi's main board, and a white-wired circuit plug connected to the center of bObi's main board.
bObi's touch sensors are attached to her cover circuit board by two sets of wires: one white and one red. Each circuit plug receives signals from one half of bObi’s touch sensors. The left plug is connected to the sensors on the right side of bObi’s front bumper, and vice versa.
Feed both wires along the inside of bObi's cover, freeing them from each black plastic hook.
Feed both wires behind the white post before pulling them to the side to disconnect them.
Now, attach the new set of sensors. The red wire plugs into the top connector; the white wire plugs into the bottom connector.
Tuck both wires behind the white post at the end of the bumper, and feed them back through the hooks.
Attach the replacement touch sensors to the empty spot on the circuit board.
Now you’re ready to put bObi’s cover back together. Reconnect the white-wired circuit plug to the center of bObi's main board and the yellow-wired circuit plug to the left side of her board. Press each circuit plug firmly until they lock in their holders.
Carefully replace bObi’s cover. Make sure its edges align precisely before laying down the contact point fastener and reinstallling its 2 screws.
Next, reinstall the 4 screws located beneath bObi's brush compartment.
Reattach bObi's brush compartment.
Line up the red brush fastener on bObi and replace its 2 smaller screws.
Lay the 2 corner pieces down.
Reinstall the 2 screws on either side of bObi's dustbin.
Reinstall the screw located beneath bObi's front wheel.
Lastly, replace bObi's front wheel by turning it towards her bumper and pressing down.
Your repair is now complete!