HP ProBook 440 G7 won't turn on

[Al_Balone]

As the title says. The LED light is flashing white and then off in roughly 5 second cycles when plugged in at the mains, LED briefly flashes orange when power button is pressed. HP support website has nothing but broken links and missing documents for LED diagnostics. I wondered if anyone here knew what it was likely to be. Laptop is only 2 years old.

 

EDIT: Caps lock is also flashing.

 

EDIT 2: NVM it was the power lead.

Edited March 22, 2022 by Al_Balone

[hallb15]

I can't see anything in the service manual that looks like the issue you are having.

http://h10032.www1.hp.com/ctg/Manual/c06481641.pdf

 

Normally I would say take the battery out and do an ATX reset, but this model doesn't have a removable battery. Sometimes there is a small hole somewhere on the laptop that you can poke an unbent paperclip into to disconnect the battery, but I can't see that on this model either.

 

If you feel up to it, I would suggest taking it apart and removing the battery and CMOS battery so you can do an ATX reset.

[Al_Balone]

Hi, thanks for taking the time to reply. Turns out it was the power lead!

[potatoler]

Hey I have exactly the same issue. I don't have the original power brick with me. I tried USB-C charging and an old DELL power brick and they did not help. Did you charge with the original one and managed booting? If so I'll try to find one.