HP Elitebook 840 G6 - added faulty RAM locks BIOS

[Androids666]

Hello. Could you please help me ?
1) I bought new notebook HP Elitebook 840 G6 (Product4WG30AV,Serial5CG02469TV)

2) before I turn it on, I installed additional DDR4 2400 8GB RAM

3) when I turned notebook on, I realized it's probable faulty or nut supported, I heard beeps 2.3, so there was some hardware issue, and this was the only part I changed. So I removed the RAM

4) I tried to enter BIOS, but I was asked for Administrator password

5) I guess, faulty or not supported RAM somehow locked my BIOS and Service refuse to help.

6) service offered to pay 20000kc (Czech crown) for new motherboard + 1000kc for replacement of new motherboard
Is there any help or another experienced such error ?

[WAWood]

@Androids666 

Inserting additional memory, should not, in and of itself, void the warranty -- so you should be able to get the laptop serviced or replaced by HP.

You would need to contact HP Customer Support directly to explore your options for this.

HP International Support: http://welcome.hp.com/country/w1/en/support.html

HP Phone Support: https://www8.hp.com/us/en/contact-hp/ww-phone-assist.html