Question Asus N56Vj totally dead - No splash screen, no bios, no nothing

[SuperBet]

Hi guys!

Today my 8 years old Asus N56Vj decided to stop working.

My laptop was running with only the battery, and it shut down. I plugged it to the charger and it didn't recognised the hard disk to boot. I already had that issue and I did the same changes in the BIOS to solve it as that other time:

1. In Boot Menu -> Change FastStart to [Disable]
2. In Security Menu -> Change Secure Boot to [Disable]
3. Then 'Save Configuration & Exit', when the BIOS screen appears again
4. Go to the Boot Menu again -> Change Launch CSM to [Enable]

When I reboot the computer.... Nothing... No splash screen, no BIOS, nothing. I rebooted pressing F2, pressing ESC, nothing... I tried taking out the battery, disconnect the battery and press power button for 40 seconds, nothing.

These are the symptoms:

• No image or even backlight on the screen.
• No image in external monitor.
• No fans, no HD sounds.
• When I turn it on, the keyboard lights up for a second with the hard disk light and then turn off.
• If I leave it on, it's like is looping or something, because after a minute or more, the keyboard and HD light turns on and off again.

I don't know what happened or what I did to kill the laptop. Any ideas on what I can try?

Thanks!