Hello my dear friend! Probably, you decided to buy a used Nintendo Switch and I will tell you how to quickly and fully test it for operability.
Console checklist:
appearance and serial number;
Wi-fi work;
account and console ban;
drift sticks;
checking all buttons;
touchpad check;
vibration work;
work of sound;
charging work (!!! Attention to charging joycones !!!);
work of doc. docking station;
work of SD cards and cartridges.
0:00 Introduction
0:12 Questions to the seller before buying a Switch
1:12 MOST IMPORTANT BEFORE BUYING
1:30 Checking the appearance and serial number
2:10 Check Wi-fi and Ban Switch
2:32 Checking Switch Drift Sticks
2:59 Checking all buttons
3:13 Checking the touchpad
3:22 Vibration test
3:26 Sound check
3:32 Checking charging and working doc. stations
3:43 Checking the operation of cartridges and SD cards
3:50 Final twist-twirl