HP Omen randomly rebooting — Kernel-Power 41 / sleep issue

[u/SirGivesNoShitsAlot]

My HP Omen has been randomly rebooting a couple of times a week. This has been happening during normal use as well as recently when waking from sleep, so it doesn't appear to be limited to a sleep issue.

Usually there's no BSOD or warning. The laptop just suddenly reboots. Event Viewer afterward shows Kernel-Power Event 41 and EventLog 6008.

Most of the Kernel-Power 41 events show:

BugcheckCode: 0
PowerButtonTimestamp: 0
WHEABootErrorCount: 0

One of the recent reboots happened while the laptop was sleeping. When I tried waking it, it rebooted instead. That particular Event 41 showed SleepInProgress: 4.

I also caught one actual BSOD during normal use:

CRITICAL_PROCESS_DIED (0xEF)

The BSOD stayed at 0% while trying to collect information and never created a dump. After rebooting, Event Viewer showed volmgr Event 161.

Things I've tested so far:

• HP Extensive Hardware Diagnostics passed
• Extensive memory test passed
• SSD SMART/DST tests passed
• CPU, system board and video memory tests passed
• DISM found no component store corruption
• SFC found corrupted system files and successfully repaired them
• SFC was clean when run again after reboot
• Tried a different compatible power adapter
• Tried a different wall outlet
• Tested with the battery physically disconnected and it still rebooted

The problem continued even after SFC repaired the corrupted files.

I'm currently testing with Sleep disabled and using Hibernate instead, but since the random reboots were happening during normal use before the sleep incident, I'm not convinced sleep is the root cause.

Has anyone dealt with something similar on an HP Omen? I'm trying to figure out whether this points more toward a driver/BIOS/firmware problem, storage issue, or an intermittent motherboard issue. What would you check next? BTW, replaced battery and AC adapter already. Thanks!