HP Elitebook 840 G5 won't boot unless both batteries disconnected and power button hold for 1 minute

[RickMtl · Accepted solution]

Hi Everyone,

I've been using the laptop at least once a day for over a month now and everything is now fine.

I closed up the case and everything is now normal, EXCEPT, that I must click on the new SHUTDOWN.BAT file icon I made to power off the laptop. (full shutdown)

The only strange thing is I can't have hibernation enabled and I can't use the regular shutdown.  The only negative is that it takes a bit longer to power up as it doesn't have the default hibernation / fast start to boot faster.

Thanks for all your help and suggstions

[MarceloStumpfs]

I was facing the same issue mentioned at the beginning. I've tried everything but the only solution at least... for me, it was disconnecting the battery of CMOS then discharging it with a little screwdriver and start up normally without CMOS battery.

It's not elegant solution at all!. I don´t believe that OS was the problem, BIOS system can not initiate, although problems started when I upgraded from WIN10 to WIN11. Never had this problem before.

Thank you and I´m looking forward to suggestions to fix definitely the issue,

Marcelo

[RickMtl]

Hi Marcelo,

Instead of discharging with a little screwdriver, you can hold down the power button for a minute.  (It will probably work holding it down for 10-15 sec too).

I thought about forgetting completely about the CMOS and just resetting the time, but you get the annoying white screen about a problem.

Have you tried to disable hibernation?  You have to do a FULL shutdown (I use a batch file on the desktop) too.

That worked for me.

Finally, there was a recent HP fBIOS update (v1.18 - Q78) from this month.  I applied it and mine still works. 

I'm tempted to swap out the working NVMe drive and install a blank one and do a normal installation of Win10/11 with hibernation and regular shutdowns and see what happens.

However, as an Engineer, I follow the golden rule, "If it isn't broken, don't fix it!"

Let me know if the latest BIOS update works for you.

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