You have not mentioned how your VIDEO output is created, but I gather from the Lenovo website that you must buy an optional NVIDIA graphics card with it. So I assume you have such a card, probably connected to your monitor using an HDMI cable. One feature of the HDMI system is that the cable carries stereo sound signals to the display device (monitor) so that can be your sound playback device. Now, there never was any standard way for SOUND created by a sound card OR by an on-board audio chip to be passed to a VIDEO card so it could be sent out on the HDMI cable. So these days ALL video cards with HDMI outputs also include on them their own AUDIO chip, and that card also comes with its own audio chip device drivers. To make life simple for users, by default almost all installation routines for these cards include installing both the video and audio device drivers AND changing a setting in Windows so that the VIDEO card becomes the default sound output device, and the signal goes from that card via the HDMI cable to your MONITOR.
No matter how many sound output devices you have installed in your system, Windows normally can use only ONE of them for sound output. This is a choice YOU set. In the lower left window type in sound settings to open the selection window. At the top of Sound Output there is a selection window for your Default Sound Output Device. Click the down-arrow to see all your devices, and I bet there are three: the Realtek chip on your mobo, the chip on your NVIDIA graphics card, and the ASUS sound card. Choose to use the ASUS card for sound output. While you are there, also note there is a similar chooser for the Default Sound Input Device. If you plan to use the jacks on the ASUS card for that, choose that for this function. When done, back out of this system. Now you should get audio signals coming out of your ASUS card jacks, instead of going through the HDMI cable to your monitor.