2002 Mazda Tribute Radio/Clock won't fully display

Hello,   I own a 2002 Mazda Tribute.  The digits on the face of the clock and radio on my Tribute don't
display fully. Parts of the numbers and letters for the radio and clock fade out randomly. When I push the
plastic face of the radio, they can display correctly. When I let go they fade out. Other times it displays
correctly, but seldom.  Are there any remedies, besides buying another radio? Thank you