Hi,
The BIOS was updated and prompted that it was successful. Unfortunately on reboot it does no go past a certain point. The error is "Product Information not valid". It seems that some relevant information like, Product Name, Product ID, Serial Number and System Board CT Number failed to transfer across to the updated BIOS.
I tried all the usual instructions like holding the Windows and B key on power up and various other options but could not even launch the Hardware Diagnostics UEFI tool. I used HP_Tool 3 in 1 USB key and couldn't boot from that either.
After failing all options I decided to remove the screen to access to the motheboard. Removed the battery power header from the motherboard, allowed it to rest for a minute, plug it back in and tried booting it without any USB. I managed to launch the UEFI tool but the "Firmware Management" option was missing. Also it seems that I can only boot the UEFI tool once only immediately after removing the battery header from the motheboard. i have to do this everytime. Next, I tried booting from the USB 3 in 1 tool. Again this had the Firmware Management missing. Please see attached screenshots.
Does anyone know why this option is missing? Any help would be apprivaited. Abs