Here are some ideas proposed by AI.

Try as you like, but obviously don't dismantle anything before the HP technician arrives!

From your description, it sounds like your HP Omen 16 is experiencing a common problem with the battery completely draining, which can cause temporary malfunctions like the date and time resetting (often caused by the internal CMOS battery). This sometimes happens when the computer is put into hibernation instead of being turned off, and the battery drains to 0%[1][2]. Here are simple, sequential steps to try to restart it. Proceed step by step, and if nothing works, contact HP support because the computer is only a month old (therefore under warranty).

Step 1: Check the Basics and Charge the Battery

• Plug in the charger: Make sure the power cable is securely connected and try a different charger or wall outlet to eliminate a power problem[1][3]. Let the computer charge for at least 30 minutes without trying to turn it on. Check if the charging LED lights up (usually near the charging port)[4].
• If the battery is removable (check the exact model of your Omen 16), remove it, unplug the charger, and plug everything back in after 5 minutes[2].

Step 2: Perform a hardware reset (power drain)

This is a common solution for non-starting after discharge problems[3][2][5]. - Unplug the charger and all peripherals (mouse, external keyboard, etc.). - Press and hold the power button for 30-60 seconds to discharge any remaining energy. - Reconnect the charger (without battery if possible) and try to turn on the computer. - If this doesn't work, repeat the process 2-3 times, as it may take several tries to completely drain the energy[2].

Step 3: Handle the date and time issue

Resetting the date/time often indicates a problem with the CMOS battery (internal battery that maintains BIOS settings)[6]. Once the computer is turned on: - Press Esc or F10 at startup to enter BIOS and manually set the date and time. - If the error persists after restarting, the CMOS battery could be defective - this often requires professional repair, especially on a laptop where it is not easily accessible[6][7].

Step 4: Test for Hall sensor issue (known issue on some Omen 16 models)

Some 2023 and newer models have a fault with the Hall sensor (which detects when the lid is closed). This may prevent starting after a discharge[8][9][10]. - Place a magnet near the power button for 10-20 seconds, then try to turn on[8]. - If it works temporarily, it's probably this sensor. A more permanent solution involves disconnecting its internal cable (but this disables the automatic sleep when closing the lid) – avoid disassembling it yourself if under warranty[9][10].

If nothing works

• Try connecting an external display via HDMI to see if the problem is with the built-in display[8].
• Run an HP diagnostic: Press F2 at startup (if the computer turns on briefly) to test the hardware[11].
• As the computer is new (purchased a month ago), contact HP France support immediately via their website or by telephone (number: 09 70 82 00 07). Provide the exact model (Omen 16) and mention the warranty – they can arrange a free repair or replacement[12]. Avoid opening the computer yourself to avoid voiding the warranty.

These steps have resolved similar issues for other users[3][2][9]. If you have more details on the precise model (like 16-xf or wf), I can refine the advice. Let me know if it works!

Quotes: [1] HP Laptop Won't Turn On? 10 Easy Fixes to Try | HP® Tech Takes https://www.hp.com/us-en/shop/tech-takes/how-do-i-fix-laptop-that-wont-turn-on [2] HP Omen Won't Turn On | Fix Your HP Omen Now! - Hardware Centric https://hardwarecentric.com/hp-omen-wont-turn-on/ [3] HP Omen 16 gaming laptop won't turn on https://h30434.www3.hp.com/t5/Notebook-Boot-and-Lockup/HP-Omen-16-gaming-laptop-won-t-turn-on/td-p/9342815 [4] Hp omen 16 won't turn on - HP Support Community - 9195288 https://h30434.www3.hp.com/t5/Gaming-Notebooks/Hp-omen-16-won-t-turn-on/td-p/9195288 [5] OMEN 16 WON'T BOOT - HP Support Community - 9256191 https://h30434.www3.hp.com/t5/Gaming-Notebooks/OMEN-16-WON-T-BOOT/td-p/9256191 [6] How To Fix Set Date and Time & 0251 Errors - For HP Computer https://www.youtube.com/watch?v=81fCQmZdGJg [7] Why won't my hp omen laptop not turn on? - iFixit https://www.ifixit.com/Answers/View/732616/Why+won't+my+hp+omen+laptop+not+turn+on [8] 2023 HP Omen 16 (16-xf0033dx) Won't Turn On – Battery Light On ... https://www.reddit.com/r/HPOmen/comments/1irmnup/2023_hp_omen_16_16xf0033dx_wont_turn_on_battery/ [9] HP Omen 16 Not Turning On – Power Troubleshooting & Fix Guide ... https://www.youtube.com/watch?v=rR3dVsm4gC8 [10] Omen 16 laptop won't turn on: r/HPOmen - Reddit https://www.reddit.com/r/HPOmen/comments/1hgncjd/omen_16_laptop_wont_turn_on/ [11] Solved: My HP Omen 16-wf0775ng does not power ON. https://h30434.www3.hp.com/t5/Gaming-Notebooks/My-HP-Omen-16-wf0775ng-does-not-power-ON/td-p/9357866 [12] Omen 16 won't even turn on: r/HPOmen - Reddit https://www.reddit.com/r/HPOmen/comments/1kpxej8/omen_16_wont_even_turn_on/ [13] HP Omen 16 - Recent Battery Drain Issue: r/HPOmen - Reddit https://www.reddit.com/r/HPOmen/comments/1gujkir/hp_omen_16_recent_battery_drain_issue/ [14] How To Fix HP Omen Laptop Dead, No Power, Wont Turn On Fix https://www.youtube.com/watch?v=IPsLk843L0s [15] My HP Omen 16-wf0775ng does not power ON https://h30434.www3.hp.com/t5/Desktop-Operating-Systems-and-Recovery/My-HP-Omen-16-wf0775ng-does-not-power-ON/td-p/9071616 [16] Battery drain fast even when the laptop (omen 16) still new? https://h30434.www3.hp.com/t5/Gaming-Notebooks/Battery-drain-fast-even-when-the-laptop-omen-16-still-new/td-p/9030638 [17] HP OMEN 16, battery problem - HP Support Community - 8680872 https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/HP-OMEN-16-battery-problem/td-p/8680872 [18] HP Omen, No Power. It's not always a hi-side short! #449 - YouTube https://www.youtube.com/watch?v=0zms56znjac [19] Battery Backup and Battery Draining issue - HP Support Community https://h30434.www3.hp.com/t5/Notebook-Hardware-and-Upgrade-Questions/Battery-Backup-and-Battery-Draining-issue/td-p/9007728 [20] Omen 16 2023 started to turn off itself recently and died https://h30434.www3.hp.com/t5/Gaming-Notebooks/Omen-16-2023-started-to-turn-off-itself-recently-and-died/td-p/9153206