Hello All!
I've IdeaPad 3 15ADA05 Laptop - Type 81W1
S/N: PF2972BX
GS550 logo on left panel
GS450&GS550&GS750 NM-C821 REV 1.0

At first it sometimes powered on and showed display, but often froze even in BIOS or just goes black screen after a few minutes on screen. When it reached the Windows 2 times PIN screen, the display went black.
After that it only powered on with a black screen.

I flashed NM-C821 DUMP.BIN, and the TPM reset screen appeared right away.
Then it froze at the Windows logo then restarted and froze with an IRQL_NOT_LESS_OR_EQUAL...