Lenovo Legion 5 Won’t Boot | CPU Crystal Oscillator Common Issue скачать в хорошем качестве

Lenovo Legion 5 Won’t Boot | CPU Crystal Oscillator Common Issue

#gpu #laptop #repair #megafix 👉For Laptop / GPU repair please contact us https://megafix.tech/ or https://megafix.cz In this video, we investigate a common issue with the Lenovo Legion 5 15ARH05 where the laptop powers on but shows no display — only a black screen. The root cause turned out to be a bad contact on the 32 kHz crystal oscillator, which provides the startup clock signal to the AMD CPU. The problem occurs when the cooling system is installed: the motherboard bends slightly, breaking the oscillator’s connection to the CPU. With the heatsink removed, the contact is restored, and the system boots normally. This is often caused by Lenovo’s black epoxy (compound) under BGA chips, which leads to solder joint degradation over time. The solution is CPU reballing, which restores proper connections and brings the laptop back to life. 🔧 This is a well-known Lenovo issue, we’ll cover the reballing process ones again in detail.