Why doesn’t my HP ZBook 15 G5 battery charge after re-flashing the BIOS?

I have an HP ZBook 15 G5, motherboard model DA0XW3MBAG0 Rev G and I am facing a charging issue after re-flashing the full 32MB MX25L256 SPI chip (descriptor, ME, BIOS region) with an external programmer. I reflashed the complete image because the BIOS was bricked before and the original image is lost. After flashing, the system boots normally and is fully functional. However, the laptop battery no longer charges. I tested with two different original HP batteries and two original HP adapters (150W and 200W). The behavior is identical in all combinations. In HWINFO the battery is detected correc

Question by Stuco1 on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.