Rm 908 Keypad Ways — Nokia 105

When the phone asks for a security gate, the ancient pre-set code is almost always 12345 .

: The keypad contact points are incredibly thin. Set your soldering iron station to a maximum temperature of 330°C to 350°C to prevent lifting the gold pads off the board. Software Factory Reset Codes

CPU (MT6250) +-----------+ | | COL0 ---|P1.0 | COL1 ---|P1.1 | COL2 ---|P1.2 | COL3 ---|P1.3 | | | ROW0 ---|P2.0 |---10k---VIO (2.8V) ROW1 ---|P2.1 |---10k---VIO ROW2 ---|P2.2 |---10k---VIO ROW3 ---|P2.3 |---10k---VIO +-----------+

You can find detailed visual track maps on technical forums or the Borneo Schematics YouTube channel for more complex hardware paths. nokia 105 rm 908 keypad ways

Disclaimer: This guide is for educational purposes. Electronic repair requires skill. Incorrect soldering can permanently destroy the motherboard. When in doubt, consult a professional.

Often points to a faulty CPU connection, water damage, or a shorted component. 2. Diagnostics: Using a Multimeter To find where the "way" is broken:

Put a tiny drop of rosin paste flux onto the target point before applying heat to ensure a clean bond. When the phone asks for a security gate,

Used to thoroughly clean carbon corrosion and dirt off the board.

Trace each from CPU ball (e.g., MT6250 balls: A5=ROW0, B5=COL0, etc.) to the physical keypad contact.

Every key has two points—a center point and an outer circle. Software Factory Reset Codes CPU (MT6250) +-----------+ |

A structured approach—visual inspection, matrix mapping, targeted cleaning, and trace repair—resolves most Nokia 105 RM-908 keypad faults. Keeping documentation of the keypad matrix for the specific unit simplifies diagnosis and repair.

: Keys are often connected in groups (e.g., 1, 2, 3 or 4, 5, 6). If an entire row is dead, check the shared track for that specific group. Keypad Codes & Basic Functions