NMI Hardware Failure - HP Probook 440 G4

Hello,

Please, I need help with following issues. I will first provide Notebook information and then, at the end, please find description of issues. Thanks for your help:

Notebook: HPProbook 440 G4
Operating System: Microsoft Windows 10 Pro (64-Bit)

Issues, errors were observed with:

No new hardware installed.
Windows 10 Pro, updated.
Bios, updated.
Drivers, updated

HP diagnostic tool reports NO issues.

ERRORS:

Blue screen with error: NMI Hardware Failure.

It occurs randomly. Notebook may work perfectly for some hours and then at any moment Blue Screen with same error.

Sometimes, Notebook presents this Blue screen with same error message just immediately after turn on.

No high temperature.

Additionally, I observe the following:

If notebook is turned off with AC Adapter connected, then notebook does not turn on with normal clicks on power button and requires to press power button permanently some extra time, 10-15 seconds, indicators led on and then with normal click it is possible to turn on normally. If notebook is turned off working on battery, then no problem to turn on, with a normal click on power button.

As per friend recommendation, we use a new RAM and a new SSD M.2 ..., and same problems!