My BT Baby Monitor 250 has a faulty power button as a result of toddler ‘droppage’.
The power button requires hard pressing and no longer has the ‘click’ it used to. It also doesn’t always reliably turn on at all.
Time for a repair!
Remove the battery compartment cover, as well as the batteries.
Along the bottom edge of the compartment are a pair of phillips screws – remove these.
The two part case is now held together by a pair of snap-together clips on each side. These can be opened with some judicious levering. The catches are shown here, circled in red: (case removed for clarity). Levering the case outwards at these points will help to release them. The case halves can then be separated.
From the side:
Gently lever out the pair of plastic clips holding the LCD to the printed circuit board.
It then lifts off, and hinges downwards.
One clip is visible here:
Remove the two small phillips screws under the LCD holding the PCB down
Then, remove the screw at the bottom of the PCB.
Gently fold the metal contact terminals that stick out through the bottom of the case inwards, and carefully prise the circuit board free from the case. (These are visible in the picture above)
You might want to remove the vibrate motor from the bottom half of the case (it’s just press fit) to get more wiggle room.
Find the problem
On inspecting the surface-mount power switch, it was apparent that its’ two securing lugs at the front had come loose from the PCB. They were originally soldered, but the solder has fractured, leaving both the pads and the tabs intact.
I simply resoldered these to the board, and quickly resoldered the joints on the two contacts at the rear of the switch to make sure they had good contact to the pads.
Reverse the above steps to reseat the PCB into the case, resecuring it with the three screws, (vibrate motor as well if you removed it), then refit LCD back into place.
Check at this point that all the buttons have a normal ‘click’release’ feel to them, (if not, sometimes the little plastic sticky foam pieces on the end of the plastic ‘button pressers’ have come adrift…)
Then snap the case back together, seating the top part first. Replace two screws under battery compartment. Refit batteries and test.