HP Surestart preventing boot

[wa1i_]

After enrolling my secure boot keys via sbctl in my choice of Alpine Linux i could NOT post my laptop anymore, and i CANNOT clear the keys by all attempts. Trust me. I tried even removing CMOS battery and by all attempts i am currently locked out from my laptop (EDIT: I get no screen out and no beeps or light codes but im not sure im even supposed to be getting some)

[Kuroi_Kenshi]

Hi,

Welcome to the HP Support Community!

I understand that after enrolling your own Secure Boot keys using sbctl on Alpine Linux, the notebook stopped reaching POST, and you have already tried clearing the Secure Boot keys and removing the CMOS battery without success.

Since you are currently getting no display, beeps, or diagnostic light codes, I would not recommend continuing with repeated CMOS/key-clearing attempts. HP notes that HP Sure Start systems do not support the standard manual BIOS recovery or USB BIOS recovery procedures; Sure Start is designed to automatically restore the HP BIOS/firmware from its protected backup if corruption is detected. 

At this point, please provide:

Exact HP product/model number (for example, the product number shown on the bottom label).

Whether the power/charging LED comes on when you press the power button.

Whether the fan spins or the keyboard backlight responds.

Whether the HP logo ever appears, even briefly.

Because this occurred immediately after modifying the Secure Boot key database, the exact model is important before recommending any further recovery procedure. Please don't flash unofficial BIOS files or attempt to modify the firmware/chip directly. '

Once you provide the exact product number, we can check the applicable HP recovery procedure and whether that model includes HP Sure Start. 

Best regards,
Kuroi_Kenshi

[wa1i_]

Hello! Extremely sorry for my slow reply as i did not realize i had gotten a reply but the laptop in question is a HP Elitebook 820 G3 and backlight will turn on and respond along with key presses and all leds will light up but with no seeming pattern and light up as in normal operation and also the fan will eventually start spinning, i succum this to be the result of the laptop warming up because i can feel some heat coming from it. Some sort of task it hangs on due to the Surestart error (Im not sure how it works so feel free to correct) 

[Kuroi_Kenshi]

Hi @wa1i_,

Welcome back to the HP Support Community!

Thank you for confirming the exact model and what happens when you press the power button. The HP EliteBook 820 G3 is a business notebook generation that supports HP Sure Start. HP Sure Start do not support the standard manual BIOS recovery methods such as Windows + B, a 4-in-1 USB key, or a USB BIOS recovery drive. Sure Start is designed to automatically repair protected HP BIOS/firmware using its backup copy.

At this point, I recommend not continuing with CMOS-battery removal or repeated Secure Boot key-clearing attempts, and do not flash an unofficial BIOS or modify the firmware chip directly.

Please try this one basic power reset:

1. Turn the notebook off.
2. Disconnect the AC adapter and remove all USB devices, SD cards, docks, and other peripherals.
3. If the battery is removable, remove it.
4. Press and hold the power button for about 15–20 seconds.
5. Reconnect the AC adapter only.
6. Power on the notebook and immediately press Esc repeatedly for about 10 seconds.

If there is still no HP logo, no startup menu, and no display, please let me know exactly what happens after this reset.

Best Regards,

[wa1i_]

Hi again! I am extremely sorry for my very slow responses as this is not my main email and in general i rarely check my emails. To answer i do get no display even repeatedly pressing esc on power up.