Notebook Charging Circuit Repair – Bahía Blanca

If your notebook does not charge, charges intermittently, only charges when turned off, or displays "Plugged in, not charging" messages, there is likely a fault in the charging circuit or power system.

At CM Informática we perform professional diagnosis and complete repair of the charging circuit, from simple faults to advanced electronics.

Symptoms of a charging circuit failure

The laptop won't charge even though the charger works.
It only charges if you move the connector.
Intermittent charging
Charging is off but not on
Message “Connected but not charging”
The battery does not exceed a certain percentage.
The laptop shuts down when the charger is unplugged.
The charger gets too hot
It does not recognize USB-C chargers

Most common causes

Fall external

Defective charger
Broken cable
Loose or worn connector

Mechanical failure

Jack DC roto
USB-C loose or torn off
damaged subboard

Electronic failure

Damaged charging circuit
Input MOSFET
BQ / ISL / TI Controller
Burned-out protective gear
Damaged tracks or pads
Non-negotiated Power Delivery (USB-C)

What do we review in the diagnosis?

Feeding

Actual charger voltage
Power consumption at standby and while charging
Entry lines and protections

Connector and plate

DC jack status
State of USB-C
Sub-board and charging flex

Charging electronics

Input MOSFET
Charge controller
Battery sensor
SMBus communication lines

The goal is to determine if the fault is external, mechanical or electronic, and if it is worth repairing based on the value of the equipment.

Repairs we perform

DC jack change
USB-C adapter soldered to the board.
Replacement of load sub-board
Track and pad repair
Input MOSFET Replacement
Charging controller repair (BQ / ISL / TI)
USB-C Power Delivery Repair
Replacement of protection circuit
Repair of communication lines

When is it advisable to repair?

It is appropriate when:

The team has good market value
The fault is repairable
The cost is less than replacing the board.
The repair is stable and safe

If it's not suitable, we'll let you know before proceeding.

Why choose CM Informática

Over 30 years of experience
4.9★ on Google with over 389 reviews
Lenovo Authorized Technical Service
In-house laboratory with advanced electronics
Real diagnosis, without trial and error
Genuine spare parts when available

Bring your notebook in for a professional diagnosis.

We are located at Misiones 730, Bahía Blanca.

We assess the fault and provide a realistic estimate before repairing.