Subject: Recurring "Boot Device Not Found (3F0)" and Blue Screen Crashes on HP EliteBook 840 G8 Dev

[Habib22_22]

Subject: Recurring "Boot Device Not Found (3F0)" and Blue Screen Crashes on HP EliteBook 840 G8

Device Details:
* Model: HP EliteBook 840 G8 Laptop
* Processor: 11th Generation Intel Core
* Memory: 16GB RAM
* Storage: 512GB SSD

Issue Description:
I am experiencing a recurring and intermittent hardware/system stability issue with my laptop that happens every 7 to 15 days.

1. Behavior Pattern: The laptop works completely fine for about a week to two weeks. Suddenly, while performing normal tasks (such as running software like DaVinci Resolve or streaming video on YouTube), the system freezes entirely, displays a Blue Screen ("Your PC ran into a problem"), and automatically restarts.
2. Boot Failure: Immediately following the crash, the laptop fails to boot into Windows and displays a black screen with the following error message:
* BootDevice Not Found
* Please install an operating system on your hard disk.
* Hard Disk - (3F0)
* F2 System Diagnostics
* For more information, please visit: www.hp.com/go/techcenter/startup

Troubleshooting Context:
Reinstalling Windows only temporarily fixes the problem, but the exact same 3F0 boot error and freezing behavior return after roughly 1 to 2 weeks. Because this keeps recurring periodically, I suspect it may be related to an intermittent SSD connection issue, thermal throttling, or an underlying storage hardware failure.

Could you please advise on the recommended diagnostic steps or hardware replacement procedures to permanently resolve this error?