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Motherboard: Mobile Phone Spares
The motherboard — also called the logic board in Apple terminology — is the central printed circuit board of a smartphone. Every functional component of the device either mounts directly onto it or connects to it. When a motherboard fails or is damaged, it typically represents the most expensive repair a phone can require, and sourcing the right one in Nairobi demands careful attention to model compatibility.
What the Motherboard Contains
A smartphone motherboard carries the processor (SoC), RAM, storage chips, power management ICs, audio ICs, modem, Wi-Fi and Bluetooth chips, and the connectors for every other component. In many modern phones — particularly iPhones and flagship Samsung devices — these chips are soldered directly onto the board and cannot be replaced individually without specialist micro-soldering equipment.
Failure Causes
Motherboard failures in Nairobi's repair market most commonly result from water damage, physical impact (usually a severe drop), power surge damage from faulty chargers, or overheating from prolonged use without adequate ventilation. Corrosion from humidity, which is relevant to Nairobi's climate especially during the long rains, accounts for a significant share of logic board failures.
Pricing in Nairobi
A second-hand original motherboard — pulled from a donor device — is the most common replacement option. Pricing varies enormously by model: a working motherboard for a Tecno Spark or Infinix Hot series phone sells for KES 2,500 to KES 5,000. Mid-range Samsung Galaxy A-series boards range from KES 5,000 to KES 15,000 depending on storage tier and region variant. iPhone motherboards are the most expensive, with iPhone 11 boards selling from KES 12,000 and iPhone 13 Pro boards reaching KES 35,000 or more for working pulls.
Considerations Before Replacement
Before committing to a motherboard replacement, a competent technician should assess whether the fault is in the board itself or in a peripheral component — a faulty charging port or power IC can mimic board-level failure. Ultrasonically cleaned and professionally tested boards are preferable to untested pulls. Luthuli Avenue has several shops offering board-level micro-soldering repair, which can be significantly cheaper than full board replacement where the fault is isolated.
