Someone I know got a R9000P 2021H RTX3070 (manufacturing month 2021 October). It died after it was used for 6 months.
1. Power LED was always off even if power supply is connected or trying different methods of holding the power button. (#26)
2. Disconnecting battery did not help. (#22)
3. Fn + S + V battery ship mode did not help. (#38)
4. Brought it to Lenovo HK repair center. They confirmed it is dead and it required a motherboard replacement. But Lenovo HK could neither repair this unsupported model nor help send it back to mainland for repair. When it was mentioned this is the exact same thing as Legion 5 Pro, their standpoint was that these are different models and they cannot order the parts for R9000P. (#16 cannot work.)
5. There is no reset hole (#19)
To check out other similar motherboard failure reports, google "reddit legion 5 7 dead rma"