A customer recently sent us a Lenovo Legion 5 gaming laptop that had completely stopped working. The charging port was physically damaged, the laptop would not power on, and once we opened it, we found another serious problem: the inside was heavily clogged with dust.
This was not just a simple charging fault. The laptop had clearly been struggling with poor airflow for some time, which had caused overheating and performance problems before it eventually became unusable.
At Geeks Callout London, we see this often with gaming laptops. They are powerful machines, but because they run hot and pull a lot of air through the cooling system, dust can quickly build up inside the fans and heatsink. If this is ignored for too long, the laptop can start overheating, slowing down, shutting off, or failing completely.
The Problem: A Dead Lenovo Legion 5 with a Broken Charging Port
When the Lenovo Legion 5 arrived at our repair lab, the first issue was obvious: the charging port was broken. The charger could not make a proper connection, which meant the laptop was not receiving power correctly.
The customer had already reached the point where the laptop was completely dead. It would not charge, would not turn on, and could not be used for gaming, work or general day-to-day tasks.
Once our engineer opened the laptop for inspection, we found that the charging issue was only part of the story. The internal fans and cooling system were badly blocked with dust. This explained why the laptop had also been overheating before it failed.
Internal Inspection
After removing the bottom cover, we carefully inspected the charging port, motherboard area, fans, heatsink and internal connectors.
The inside of the laptop showed clear signs of restricted airflow. Dust had collected around the fans and vents, making it difficult for heat to escape. On a gaming laptop like the Lenovo Legion 5, this can seriously affect performance and long-term reliability.
A blocked cooling system can cause:
high temperatures
loud fan noise
sudden shutdowns
poor gaming performance
lag and thermal throttling
battery and charging stress
possible motherboard damage over time
Before replacing parts, we always carry out a proper inspection so the customer gets a clear and honest diagnosis.
Repair Step 1: Charging Port Replacement
The first repair was the damaged charging port.
Our technician removed the faulty port and replaced it with a suitable replacement part. This restored the laptop’s ability to receive power correctly from the charger.
Once the charging connection was repaired, we were able to continue testing the laptop and confirm that the power issue had been resolved.
This step was important because without a stable charging connection, the laptop could not be properly tested under load.
Repair Step 2: Internal Dust Cleaning
After the charging fault was repaired, we moved on to the overheating problem.
The laptop was carefully cleaned internally, including the fans, vents and cooling channels. We removed dust build-up from the areas that were blocking airflow and checked that the fans could spin freely.
This type of cleaning is especially important on gaming laptops. A normal external clean is not enough when dust has built up inside the cooling system. The laptop needs to be opened properly and cleaned without damaging the fan blades, cables or board components.
Once the dust was removed, the cooling system had a much better chance of doing its job.
Repair Step 3: Thermal Paste Replacement
Because the laptop had been overheating, we also replaced the thermal paste.
Thermal paste helps transfer heat from the CPU and GPU to the heatsink. Over time, it can dry out or become less effective, especially in machines that run hot for long periods.
We cleaned the old thermal paste and applied fresh, high-quality thermal compound to improve heat transfer. This helped the Lenovo Legion 5 run cooler and more reliably after the repair.
For a gaming laptop, this step can make a noticeable difference in temperature, fan noise and overall performance.
Testing After Repair
Once the charging port was replaced, the cooling system cleaned and the thermal paste renewed, we carried out full testing.
The laptop was checked for:
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charging stability
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power-on behaviour
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fan operation
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temperature levels
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keyboard and trackpad function
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display output
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general Windows performance
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gaming laptop stability under load
The Lenovo Legion 5 powered on successfully and started working again. More importantly, the temperatures were much healthier after the dust cleaning and thermal service.
The laptop was no longer a dead machine sitting unused. It was back in working condition and ready for the customer again.
Turnaround Time
We understood that the customer needed the laptop back as soon as possible, so we kept the repair process efficient.
From arrival at our lab to completion, testing and return preparation, the repair was completed within 2 days.
For a gaming laptop with both a charging fault and overheating problem, this was a good result. The customer avoided replacing the entire laptop and got their Lenovo Legion 5 back in usable condition.
The Result
This Lenovo Legion 5 came to us with a broken charging port, no power and serious internal dust build-up. After a proper diagnosis and repair, we were able to bring it back to life.
The repair included:
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damaged charging port replacement
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full internal dust cleaning
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fan and vent cleaning
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fresh thermal paste application
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power and charging tests
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temperature and performance checks
The laptop was successfully repaired, cleaned, tested and returned to the customer.
Why This Case Matters
This repair is a good example of why laptop faults should be diagnosed properly instead of guessed.
At first, the issue looked like a straightforward charging port problem. But once we opened the laptop, it was clear that the cooling system also needed attention. If we had only replaced the charging port and ignored the dust and overheating, the customer could have faced more problems later.
Gaming laptops need regular maintenance, especially if they are used heavily. Dust build-up and old thermal paste can slowly reduce performance and increase the risk of internal damage.
Need Help with a Lenovo Gaming Laptop Repair?
If your Lenovo Legion laptop is not charging, overheating, shutting down, running slowly or refusing to turn on, Geeks Callout London can help.
We repair Lenovo gaming laptops and other high-performance laptops, including charging faults, overheating problems, fan issues, SSD upgrades, keyboard faults and motherboard-level repairs where possible.
Contact Geeks Callout London to arrange a diagnosis, collection or repair service.
Author 's Profile
Aamir.M
Aamir Mehmood is a Senior IT Consultant & Technology Writer with over 15+ years of experience and one of the founders of Geeks Callout, an award-winning London-based IT support company specialising in PC, MacBook, and gaming repairs. He is recognised for delivering reliable, customer-focused IT solutions. Under his leadership, Geeks Callout has won multiple honours, including the 2023 Business Excellence Award and the 2025 SME UK Enterprise Award. Aamir also writes insightful articles to simplify complex technology, making him a trusted voice in London’s IT community.
