Nokia 6610 keys 1,4,7 and * not function properly
Such damage often occurs because the problem is very mild, usually biased because of dirty or have been too long that eventually the keypad board covered with mold, damage to the keys 1, 4, 7 and * a line Row 2 is connected to the CPU.
If the fourth button is not working then likely drop out of line or interference with the keypad IC. See the scheme below jumpers technique.
Such damage often occurs because the problem is very mild, usually biased because of dirty or have been too long that eventually the keypad board covered with mold, damage to the keys 1, 4, 7 and * a line Row 2 is connected to the CPU.
If the fourth button is not working then likely drop out of line or interference with the keypad IC. See the scheme below jumpers technique.
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