Lenovo X1 Carbon (4 Gen) - not powering up

Summary

Key Points

• —The video documents the repair of a dead Lenovo X1 Carbon laptop, which presented with corrosion and a broken resistor. 0:16
• —A broken 480k ohm resistor was replaced, and a missing mosfet pad was reconnected with a wire, secured with UV glue. 0:36
• —Initial testing confirmed the laptop was completely dead, as the fan did not spin despite power being supplied to the connector. 1:07
• —The repair involved intricate micro-soldering to fix corroded and cut PCB traces, requiring "stitches" with fine wires. 2:52
• —A critical fast switching diode was found to be broken and was temporarily replaced with a standard diode while awaiting the correct component. 5:14
• —The repair process necessitated finding and purchasing a schematic to identify torn-out pads and understand the complex circuit. 5:33
• —After the repairs, applying power caused the board's LED to light up and the fan to briefly spin, indicating partial restoration of functionality. 6:19
• —The technician hypothesized that the fan stopping after starting might be due to the temporary, non-fast switching diode. 6:46
• —Despite the temporary diode, the laptop board showed signs of life, which was considered a significant achievement. 7:25
• —The final steps include replacing the temporary diode with the correct one, installing an SSD, and fully assembling the laptop for complete testing. 7:31