Connecting tracks – the Nokia 2720 keyboard problem solution folding repair
Here’s the Nokia 2720 solution for not working keypads problem. This solution provides the connection line paths of the keyboard interface .
This may not work for hardware failure , so you can first try to ensure that the firmware of the device is calibrated already . Clean the entire keyboard interface , including the membrane keyboard if oxidation accumulation found . Also check the rubber keypads silicone its still in good condition.
You can refer to the solution below if basic procedures above do not resolve the problem. and follow certain procedures step by step we have prepared .
. In this solution the On / Off button is not included but we have also prepared a jumper solution for him , it can only work for numeric buttons and navigation such as: 1 , 2, 3 , 4, 5 , 6, 7 , 8, 9, * , 0 , #, UP, DOWN, lEFT, RIGHT, programmable left, right, select / action and Send.
Repair Tips for Nokia 2720 fold mobile phone keyboard problem :
If there are only one or two keys on the keyboard do not respond, you can suspect that the problem can be found in one of the paths open lines. Just draw the connection that the keys and managed to establish a rider on it.
If more than three or four keys on the keyboard do not work, you may think that the problem is on one of the paths of the line open connection or is the keyboard filter IC . Check and follow the connection of these keys , then replace the keyboard filter IC if connection paths is correct.