* Did you disconnect the main battery when you took out the CMOS battery and press the power button to discharge any residue electricity?
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* Did you disconnect the charger and the main battery when you took out the CMOS battery and press the power button to discharge any residue electricity?
* Some suggest reflashing the UEFI/BIOS.
* I would also run a full virus/ malware scan to be safe.
Apparently this is a known issue. Great eh!
* Just go into the BIOS/UEFI and set settings to Default by mouse click or pressing <F9> key. That should do it.
* (''this for other readers'') This video is for the FX504 but the instructions are probably similar for the FX505.
[link|https://www.youtube.com/watch?v=JhhoXIVkULE|ASUS TUF Gaming FX504 CMOS Battery|new_window=true]
* Did you disconnect the main battery when you took out the CMOS battery and press the power button to discharge any residue electricity?
* Some suggest reflashing the UEFI/BIOS.
* I would also run a full virus/ malware scan to be safe.
Let know how it goes.