my hp probook 6540b shuts down unexpectedly after booting.It remains on for about 2 minutes then shuts down and on...

please try this options , I used to have this problem but mine wasn’t charging at all. (1) Update iTunes. Generally, iPhone owners use iTunes to connect to their computers, regardless of whether they're running a Mac or a Windows PC. As such, it's always a good idea to ensure that you're on the latest version of iTunes, since the problem could stem from some kind of bug the latest version fixes. (2) Update your operating software. If you've done all of the above, including updating iTunes, your next port of call should be to trying updating your OS (if an update is available). We delve into this for both macOS and Windows. (3) Update your Driver Software. This step applies only to Windows users, and it involves updating the software that handles how your computer connects with your iPhone. (4) In most cases, you would have downloaded iTunes from the Microsoft Store, which means that you need to follow the steps below: (4.1) Unlock your iPhone and open the Home screen, then connect it via USB cable to your...

This happened to me several years ago. Perhaps while trying to use a “Fn” key to change the volume on my laptop, I disabled my touchpad by pressing the wrong button. For weeks I didn’t know what the issue was, which wasn’t helped by the touchpad function icon on my keyboard looking just like a monitor icon, and it took me a while to realise that maybe it was in fact a touchpad icon. While holding the “Fn” key, press every function button (the “F” keys) with a symbol on it that looks like it could be your touchpad to see if it switches back on. (Bear in mind, you might turn off your screen this way, so just press that button again if that happens.)