Use a T5 screwdriver and plastic opening tools to carefully open the shell and expose the motherboard.
: The default factory security code for the Nokia 105 is 12345 .
Identify the resistor connected in series with this line near the CPU and jump it to any point on the middle column trace. 3. Keypad Row 3 (3-6-9-#) Not Working
**Keys 1, 4, 7, ***: Often share a common track that may require a jumper if the entire column fails. Keys 2, 5, 8, 0 nokia 105 rm 908 keypad ways
This comprehensive technical guide outlines the architecture of the , mapping out the exact jumper tracks, diagnostic steps, and repair techniques needed to restore full functionality. 1. Understanding the Keypad Matrix Architecture
Usually acts as a shared negative (-) or row line completing the circuit.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Use a T5 screwdriver and plastic opening tools
Remove the back cover, battery, SIM, and memory card. Unscrew the 5 Torx T5 screws. Carefully separate the front chassis from the mid-frame. Detach the keypad flex cable from the motherboard connector.
Your jumper wire is too long and acting as an antenna, or you have a cold solder joint causing intermittent connection. Re-solder with less wire length and more flux.
If physical cleaning and inspection don't solve the issue, it's time to use a digital multimeter (DMM). This step will help you identify if a specific conductive trace on the PCB is broken, a process known as a "cut." including any personal information you added.
Only one key (e.g., the menu key or down arrow) is unresponsive. Complete Keypad Failure: No keys work. Required Tools for Repair Soldering Iron (fine tip) Soldering Wire Jumper Wire (thin copper wire) Multimeter Screwdriver (T6) Nokia 105 RM-908 Keypad Ways Diagram & Solutions
If the multimeter reads 1 or OL (Open Line), the track is broken somewhere along the circuit. Step 3: Inspect the Inline Resistors