Hi @aukisuper
Count the number of blinks to find out what the problem is.
Here's a [https://support.hp.com/us-en/document/ish_1997719-1528356-16|article] that shows what it may mean.
Select ''Identify notebook light or beep code.''
Here's the [https://kaas.hpcloud.hp.com/pdf-public/pdf_12667813_en-US-1.pdf|maintenance and service guide] that will help if there's a faulty part that needs replacing.