Good day!I hope to get an answer to my simple question. I have a Lenovo y545 laptop and about a year ago my keyboard stopped working. I wasn't particularly worried about this, having an external keyboard. And now, having handed over to the service center, I found out that the problem is not in the keyboard, but in the bios. Updating the bios does not fix the situation. The specialist said that you need to look for a bios version a year ago or even earlier. Can you tell me where this version can be downloaded?