Today, we’re sharing an interesting case study involving a completely unresponsive Lenovo laptop that arrived at our workshop which eventually needed a MOSFET repair.
The Initial Assessment
When the Lenovo laptop arrived, it showed no signs of life – no power, no LED indicators, and no response to any inputs. While many people might immediately suggest a complete motherboard replacement, our approach at Whitedog is always to investigate deeper, potentially saving our customers fair sums of money.
Diagnostic Process
Our technical team conducted a thorough motherboard-level diagnosis using professional testing equipment. Having disassembled the laptop and through systematic testing with a multimeter, we performed detailed diode readings across the board’s components. This process revealed something quite unusual – two faulty MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors).
What makes this case particularly interesting is that typically, we encounter single MOSFET failures. Finding two faulty MOSFETs simultaneously was a rare occurrence that highlighted the importance of thorough testing rather than making assumptions based on common fault patterns.
The Repair Solution
After identifying the precise issue, our skilled technicians carefully removed the damaged MOSFETs and replaced them with new, high-quality components. This delicate procedure required precise micro-soldering work and careful handling of the motherboard’s sensitive components.
Successful Outcome
Following the MOSFET repair, we conducted extensive testing to ensure everything was functioning correctly. The laptop powered up perfectly and all systems were restored to full working order. This repair not only saved our customer the significant expense of a full motherboard replacement but also prevented unnecessary electronic waste.
If your laptop or any other electronic device is showing signs of failure, don’t assume the worst. Contact us for a professional diagnosis. We specialise in motherboard-level repairs that can often save both money and resources.