Hey everyone,
I’m hoping to get some advice before making a big decision.

I bought an HP OMEN Max 16 (Ultra 9 + RTX 5080) from the US on Dec 18. For the first ~2 weeks, everything was working normally. Then I started facing a boot issue.

After shutting the laptop down, it often won’t boot at all Power button LED turns on for ~8 seconds Then it turns off No fans, no keyboard lights, nothing .Repeating this does nothing

Sometimes, after many attempts or waiting a long time, it randomly boots again.
At one point I opened the back and disconnected the battery cable, then plugged it back in.

After that Laptop booted with a “CMOS invalid” message will attach a pic for that
And Worked normally
Since then If I leave the laptop in hibernate, it boots every time. If I shut it down completely, the issue comes back
Disconnecting and reconnecting the battery again fixes it temporarily then I decided to shut it down after a couple of days and sees what will happen and guess what it didn't work.
After That I did  remove the battery cable and plug in the charger, the laptop boots normally then plugged the battery cable and left it on hibernate and closed the back.

I thought it's a BIOS / firmware issue.
BIOS was updated twice. Once automatically on Dec 19 and Once manually recently
Updates seems to be  completed successfully. Issue still exists

USB power issue

Another strange problem When launching a game and the laptop switches from integrated GPU to RTX 5080, all USB devices disconnect briefly for a few seconds. This stopped happening when I forced NVIDIA GPU only
Not sure if this is normal or an issue.

While gaming on the charger, the battery still drops by about 15–20% depending on load and time.

This is my first OMEN, so I don’t know if this is expected behavior or not.

Windows display bug.

After every shutdown, Windows shows two displays detected, even though I have no external monitor.
This messes up brightness control until I fix it manually. Feels like a Windows bug, but mentioning it just in case.

I’m currently in Egypt. Sending the laptop back to the US would be extremely difficult but if I have to I will.
HP Egypt likely won’t help since it's purchaed from the US
If I was 100% sure this is just a battery issue, I could replace it myself
But I’m worried this could be a power delivery / motherboard issuu

Does this sound like a faulty battery?
Or is this more likely a motherboard power circuit problem?
Any help would be really appreciated.
Thanks in advance 🙏

Omen Max booting issue.