HP probook 440 G3 Won't power on

[Shakur2]

I am working on MS word.suddenly my laptop turn off.then I trying power on but not.after sometimes when i try to turning on,it’s going power on.then i restart the laptop,shutdown but won’t turn on.now the problem,when i turning on 4led blinking & the CPU fan getting high speed & the storage light on with yellow colour.please give me a solution to resolve it.

Thank you HP expert team.

[BeemerBiker]

This does not sound good.  Take out the memory chips,  use an air duster, clean the motherboard as best as you can.  Clean the memory chips put them back in one at a time and see if it turns on..

• Turn on the computer by holding the power button down for 20 full seconds then release.
• Press the Power button one more time (if necessary) to start the computer.

If it turns on see if you can run diagnostics

Tap the ESC key after powering on. Tap it once a second after you see the LEDs on the keyboard flash. When you see the startup menu, press F2 to run diagnostics.

[Shakur2]

My laptop turn on but it again goes turn off after 5 to 10minutes.how can i solve it

[Shakur2]

 wifi,speaker & storage led shown & the cpu fan run very fast

[BeemerBiker]

Disassemble and clean

https://www.youtube.com/watch?v=2PJPVEaEmBo&ab_channel=LaptopRepairHelp

Cleaning without opening the PC

How to use air duster from WIKI how
https://www.wikihow.com/Clean-a-Laptop-with-Compressed-Air

General instructions for cleaning from HP tech.
https://www.hp.com/us-en/shop/tech-takes/how-to-clean-your-laptop#

This HP video shows how to clean air vents on your laptop.

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Interior cleaning a PC

Before touching any component inside a PC you should touch the metal case first to allow any static electric to discharge.
If you do not have the proper surface for working on electronic equipment, then use an anti-static spray around the work area.


General instructions
Desktop cooling info by the memory people

Video from YouTube
https://www.youtube.com/watch?v=TffCxHuAVWs

Did you pass the F2 diagnostics?