Windows 11 Upgrade Guide
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You may also want to try removing the AC, main battery and then the BIOS/RTC battery.
You can also remove the AC, main battery and then remove the memory SIM next to the BIOS/RTC battery.
If there is any plastic shield under the memory remove it.
Look for 2 Gold/Copper looking contacts on the system board that looks like this.
Short them with small flat head screw driver. "Make sure to do it 2-3 times"
The picture shown does not match the nx9420, with motherboard "SPS-409959-001 MB".
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