I did not realize it was that new. Here is how you do a factory reset: -
❏ Resetting the unit (this resets the unit settings to the default) If the restart of the unit does not solve the problem, reset the unit, and restore all the settings to the factory default at the time of purchase. This may solve the problem. If the unit is reset, your settings are restored to the default values. Be sure to note down your setting contents before performing the following operations. 1. While pressing and holding ZONE 2-CONTROL of the input selector on the main unit with the unit turned on, press the STANDBY/ON button. 2. "Clear" is displayed on the display, and the unit returns to the standby state. Do not remove the power cord until "Clear" disappears from the display. To reset the remote controller, while pressing and holding MODE, press CLEAR at least 3 seconds.
I highly doubt a soft reset will work. Try at least three resets before you give up.
If you can not get the LCD to show clear, then it will not take a reset and has serious problems.
If you bought in December then you should be eligible for a replacement unit, depending on what the warranty says. It is a 2019 year model and you bought it December 2019.
I doubt they will let you exchange it for something else, but give it a try, if it will not reset. The Pioneer/Onkyo gear does not have a good reputation. The problem is that these units when out of warranty are generally not worth the cost of repair, or can not be repaired. That is the way of robotically placed component boards, where the components are surface mounted.