FYI-On the bottom of the printer there is a Belt (Underneath the printer) and this belt is what rotates the tray upwards and downwards manually.
Can you please rotate the belt manually by hand (with the printer off) and then once it moves then Power on the printer (just in the back) and use the LCD panel to move the tray upwards. If the printer tray is responsive then power on again from the front and continue working - if not then please CONTACT SUPPORT for better assistance further.