BIOS for blind flash Yoga 7 14ACN (82N7) 5800U

[xiongnemo]

I misconfigured my UEFI settings and it now won't POST. Removing CMOS battery is of no use. I tried to put BIOS.fd in and use Fn + R to blind flash, but also no use. The charging light just flashing amber while ESC and CAPS LOCK turned off and on every 5 or maybe 7 times when charging light flashes. I wonder whether my extraction from Lenovo website suits this occasion and if not, maybe someone of you will have one?
Many thanks!

[SMDFlea]

RULES UPDATE for BIOS requests/offers AVOID BANNING, READ BEFORE POSTING
https://www.badcaps.net/forum/troubl...before-posting

[xiongnemo]

Sorry for the inconvenience!

MO: PFNNXB1531076
S/N: PF2YJWP8 (Chinese Version)
MB P/N: 5B21C81146
On the same label with MB P/N: 885B21C81146L1HF15PB0DZ
'46J SN TXT Code; on MB: 15414038004384511GK1210G HYG40 10D2
BIOS Chip seems to be 74M12JWSIQ

[xiongnemo]

In my estimation, the issue should be resolved either with a successful blind flash or resetting the nvram after I manage to get a dump of the original chip.