Finally solved the problem.
What I did:
1. Completely cleaned the second BIOS chip. And soldered it in place (without writing anything into it)
2. In the main BIOS chip flashed the files that threw “danito” (In them BIOS built from the update on the official site HP).
3. Main BIOS chip soldered on the board.
4. Check the soldering! Everything is soldered.
5. Via BIOS Configuration Utility flash SN, PCID, CTNumber, FeatureByte, BuildID
Done. No more passwords and no more Security Endpoint controller Problem errors.

That didn't fix the problem. Now the notebook does not turn on the first time. It says: Final step of BIOS update. Then it reboots and flickers caps lock 7 times. Several times I managed to boot into Windows and flash SN, PCID, CTNumber, FeatureByte, BuildID via BCU. If you turn off and disconnect the RTC battery for a while and then reconnect it again, it may turn on. Is this a problem with the firmware in the second chip?

Deleted the first byte from your file and the laptop turned on. Thank you....

Thank you. I tried that but it didn't work. At first it tried to turn on (even the fan was spinning) but then caps lock started flickering again and won't turn on....

Board Number: LINDEN 6050A3147201-MB-A01 (A1)
ProdID: 8RN38AV
SN# 5CG1271K42
Build ID: 20WWLDDT601#SAK8#DAK8

I tried to remove the password, read BIOS with CH341A (3.3V fix) programmer. BIOS was read in NeoProgrammer 2.2.0.10. Dump data was read and checked 4 times (compared in HxD). Deleted data area 37000 to 37820 via Hxd. Flashing. At power on, the power LED is on and caps lock flickers 7 times. Flashed back dump BIOS and still the laptop does not turn on. I think the dump is corrupted. Please see how bad it is. (Pardon my English)...