Hi, today I have really big problem with my RB Metal 2

I just purchased it two weeks ago, and it has been running on a tower for almost one week now. But last night, the metal just rebooted for no reason at all and in the log it shows "Kernel failure on previous boot". Then I checked the interfaces and surprisingly the WLAN interface disappeared!. The system > resources > pci also shows nothing. Already netinstalled it, didn't work. Downgrading to 6.29.1 didn't work. Upgrading to 6.40rc15 didn't work either. Please help me out! Thanks. Supout file already attached..

This is an RMA case.