Lenovo Tab s8-50 Wont turn on

My tab is not rooted, and I did a system update, during the update, tab died and wont turn back on. Here are the things i've tried: (all test where done with 30min - 1 hour or charging time in between)

- Power Cycles (plugged + power btn 20+ secs, etc etc.) - no go

- Removal of power ribbon + power button then connect to charger - no go

- Vol + power conncet to PC - no go

My hope was to flash it with the latest rom from Lenovo, but my tab cant be detected by the PC.

Been 3 days working with this, Any help please?