Laptop not switching on

[Akash289]

While I just switching on the laptop it is not switching on only the LED of the power button is blinking

[Oakwinlinz]

How many times is your laptop led is blinking, on some HP laptops this can mean there is an error.

[Akash289]

The led in the Caps Lock button is blinking twice in long gap and twice in repeatedly

[Oakwinlinz]

This error seems to be a BIOS error, from what I read you can try resetting the CMOS or reflash the BIOS.

[WAWood · Accepted solution]

@Akash289 

Most likely, the PC is experiencing a major hardware failure -- this is especially true if the CapsLock key is blinking or there is beeping.

Since the PC is a laptop, this HP thread describes the different blink and beep codes: https://support.hp.com/us-en/document/c01732674?jumpid=reg_r1002_usen_c-001_title_r0001

From this table, while the problem is the BIOS, it also indicates that you have to use external media to reflash it.  The internal copy is apparently also corrupted.