Windows 10: My HP laptop has trouble turning on whenever it is shut down.

The screen is completely blank, but the power button is on and the caps lock is flashing as well—3 long, 5 short. It usually takes a long pattern of turning it off and turning it on for it to work. The second time this happened, I got an error saying "CMOS checksum is invalid". Will I have to take my laptop in or is it fixable on my own?

:)

 

My hp laptop wont turn on

This is a frequent problem am sure as you have already seen from online searches.

Flea power is usually the culprit here, basically its residual power that remains on the computer even after thecomputer has been shutdown. You can drain the flea power with the steps the other answers have suggested.

• Disconnecting the battery and adapter
• Press the hardpress the power button for 30 seconds
• This should clear the flea power

If this doesnt work, read this article its about
a dell inspiron but the same applies for you hp. It has some detailed step by step instructions

 

HP Pavilion 15 randomly shuts down incorrectly if fast startup enabled

I've just updated an HP Pavilion 15 from Windows 8.1 to Windows 10 (Home 64 bit). If fast startup is enabled, the laptop freezes at the very least step of the shutting down process. The shutting down process goes like this:

1. First you click on shut down
2. The shut down screen appears
3. The screen turns off and then the fan starts to spin at high speed
4. After 4-5 seconds, the fan stops
5. The laptop is completely turned off, no lights are turned on (in most of PC's)

Well, my problem is that randomly, the Pavilion 15 freezes after step 4 has been completed, with the light of the ON/OFF button turned on forever. Sometimes it turns off correctly, but many other times this happens. If I disable the fast startup, this won't happen and it will always turn off correctly.

What can I do?
How is it that it's random?

I've tested this with no apps running on background, so that can't be the reason, besides, no apps or programs can freeze the system after the step 4 has been completed, since they are all shut down after step 1.

Also, the fast startup option was activated when I was using Windows 8.1 and never had a single problem with this laptop.

 

HP Laptop Boot Loop

I am encountering a boot loop problem with my HP laptop. Upon startup, it shows the HP logo and loading dots for about 11 seconds, then goes to a blank screen for approximately a minute before automatically restarting. The power button does not turn off during this cycle.

Troubleshooting Steps Taken:

• Tried hard reset and accessing BIOS/UEFI settings.
  
• Unable to boot into Safe Mode or recovery environment.
  

please see here the recorded video demonstrating the boot loop behavior for reference.

Any advice, troubleshooting steps, or insights into what might be causing this problem would be greatly appreciated.

Thank you in advance for your help and suggestions.