Windows 10: Elitebook 840 g2 having multiple BSODs’ consecutively

Hello, my laptop recently started being frustrating. Firstly when I try turning it on, the keyboard light just flashes like it doesn’t start up fully. The light keeps flashing until I hold down the power button to turn it off. I told someone about it, he advised I remove one of the RAMs and try starting it again. It worked I put the RAM back after it turned on. The next thing is it starts showing me “the system has detected that a cooling fan isn’t not operating correctly “. I had this error like 3 times. 2-3 weeks later I’m now having multiple BSODs. My laptop won’t even start up. I’ve tri

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HP ELITEBOOK 840 G2 hp drive encryption tpm authentification failed.(0xa)

HP ELITEBOOK 840 G2 hp drive encryption tpm authentification failed.(0xa)

I cant login, can access bios, restoring security settings doesnt help. i also have winmagic data security on my screen and have never seen this before. pls help

 

Making "Restore Media" for two MAR REFURBISHED HP EliteBook 840 G2 Computers

I purchased two MAR REFURBISHED HP EliteBook 840 G2 Computers from Walmart. The first came from Joy Systems; the second from Arrow. New HP's come with a "factory restore Image" in a separate partition on the hard drive and a program, which will run only
once, that allows the owner to create one copy of a "factory restore image." These MAR HP refurbished computers came with neither. What Joy Systems advertises as "restore media" is only a series of procedures that will restore Windows 10 to all of the default
settings.

I believe Microsoft has a link, which will allow you to download the "update version" of Windows 10 for those who updated from Windows 7 & 8.1, but I believe that does not include the HP drivers for the hardware. Getting the correct drivers is very difficult,
and very time consuming if you know how, which I do not.

This will not help should the computer become infected with serious Malware, where I have always been able to run a "out of the box - factory restore," then reupdate the computer, reinstall any added programs, and that totally corrects any problems.

I have been told that the 1809 version of Windows 10 has built into it a procedure to create an "out of the box - factory restore" media on a flash drive, exactly like the "run only once" program on a new HP computer would create.

If it is possible to create an "out of the box - factory restore" media on these two computers, would someone tell me how to do it, or where on Microsoft's website the instructions are for doing it?

HP EliteBook 840 G2's have no disk drives in them.

I would do it on the Arrow refurbished computer first because this computer has no added Programs or HP driver updates added to it. Will the restore media created on this computer (if it is possible) also work on the other HP EliteBook 840 G2 Computer, or
should I create a second restore thumb drive for this computer too?

If I create one on the first computer, which has programs added, should I delete them before starting?

Very little is in the small amount of literature that came with these computers, and the HP online manuals are for new computers.

Thank you for your help.

 

Elitebook 840 with new ssd will only boot on mains power

Having replaced the OEM hard drive on a number of elitebook 840s with origin inception 120 & 240 gb ssds they will now only boot when connected to mains power.
When on mains power we don’t experience any issue, but when the laptop is running on battery power, we receive an error message stating that, “No bootable image found, notebook will be shutdown”. We have experienced this issue on many machines and we have also tried installing new batteries into the devices, but the problem persists.

It doesn't seem to matter which os is on the disks either. Is there some kind of bios power management settings that's not getting enough juice to the ssd from battery? Surely ssds use less power than spinning disks - but is it so little that the bios thinks there's nothing there?

Any troubleshooting steps or suggestions welcome!