Lenovo notebook error message?

My Lenovo Y70-70 Touch (17.3-inch, Intel Core i7-4710HQ, 3.5GHz, 16GB RAM, 512GB SSD, NVIDIA GeForce GTX 860M / 4GB) has recently received the following error message and can't be started:

Did anyone ever have such a message? And if so, how do I fix the mistake?

What you see there's not a mistake, but the notebook's attempt to boot from the network card.

The mistake is probably that the notebook has problems with the hard drive and can't boot from the HDD / SSD.

Unscrew and check if the cable has come loose on the hard disk.

Unfortunately, everything is bombproof. I exchanged the SSD once. Still the message. Another idea?

Have you installed an operating system on the SSD?

Yeah sure. The box ran so even four years without moaning. And from today to tomorrow this message appears. Did not fall, no one was exposed to violence, nothing.

Unfortunately, everything is bombproof. I exchanged the SSD once. Still the message. Another idea?

Did you go to bios at the start? Let's see if the hard disk is recognized as such at all. If it is not listed there, then either board or SSD broken.

Defragmented, you do not have the SSD, I suppose. Do not do this

I'll try it later. No, I know that.