@Lost_N_BIOS nothing to do ... I tried all the settings you recommended ... I flashed the new BIOS but nothing .... it doesn't work ... when I turn off the computer the lan card switches off ... I know that the motherboard does not support it ... even if I don't understand why there should be the entry on the BIOS .... in sleep or hybrid mode instead the lan card stays on ... but the problem is that I cannot enter it if I have connected the graphic amplifier .... I guess the only option I have left is to make a jumper on the power cable and connect an external button..I have seen that on Amazon they sell these buttons for desktop computers but I think it is not difficult to make them compatible with a laptop ... I'm really pissed off with Dell ... they charge you more than 2000 euros for a computer and then if you want assistance you have to pay 500 euros a year or else they tell you they can't help you because the support has expired one year after purchase ...

Edit: I wanted to share this guide with you to see if it could be true on how to flash the stock BIOS in case of problems ... what do you think ??

1. Download BIOS update file from Dell. We will call the downloaded file "BIOS.EXE" for this tutorial.

2. Open Command Prompt, and direct Command Prompt to where the BIOS.EXE file is located.

3. Run from Command Prompt "BIOS.EXE /writehdrfile

4. Open File Explorer and navigate to the directory where the BIOS.exe file is located. You will find, in that directory, a file named "BIOS.hdr"

5. Rename this file to "the first five digits of your motherboard part number.hdr". For example, in my case, Googling "Alienware 13 motherboard" showed me the part number for my motherboard is "ZAP00 LA-A301P", so my file name is ZAP00.hdr.

6. Copy this file to a USB drive formatted to FAT32.

7. Disconnect the battery in your laptop.

8. Insert your USB drive into the USB port closest to the power jack on your laptop.

9. Hold down the "END" key and insert your power adapter into the laptop. When you hear the CPU/GPU fans come on, let go of the "END" key.

10. Be patient and wait. My install took about two minutes to complete, and the laptop turned itself off.

11. Remove USB drive, press power, and hopefully you will have a fully functioning laptop!

Sorry to hear! Yes, for a power button, you can use any 3-12V momentary switch, and make a cable as long as you want.
That method is more for BIOS recovery, or alternate method if you can't run the exe, rather than a standard BIOS flashing method.
To flash BIOS, you simply run the stock EXE. Also, not all Dell BIOS will have HDR/PFS in the exe, so it may not apply to all systems/models

@Lost_N_BIOS anyway I extracted the BIOS of the alienware 15 R2, and I opened it with Ami but I don't notice many differences from mine ... besides I also see that OEM DOCK menu there etc ... it is really absurd that the wake on lan does not it works ... unfortunately the lan turns off when the computer is off ... I give up by now and I hope that DELL wakes up to put these basic things in their computers ... thank you very much for everything ...

You're welcome! Sorry we can't get the LAN thing sorted out!
Do you want to see about getting the OEM Dock menu visible to you?

@Lost_N_BIOS Thanks man...yes if you can...hovewer i have a update....i change a few settings on bios and now i can hibernate the laptop....and i can Power On pc by Press the button on keyboard....that's fine ... at least I don't have to take the computer out of the drawer and open the lid .... unfortunately even in the state of hibernation the WoL does not work ... the lan port switches off...I didn't notice any slowdown on restart ... and the amplifier works perfectly ... I'm Happy like that..

Please help me unlock bios on alienware 15R1. I really want RAID0, I have 2 ssd m.2 installed. sorry for google translator