So, I haven't played TF2 in about a week, and I'm currently experiencing some issues with my graphics. Whenever I open the main menu for TF2, it's filled with the purple and black checkers pattern of a broken texture. Upon entering a game, the textures continue the pattern, blocking my view of the different classes. When I actually play the game, I will not hear any of the character dialogue, and I can see the design outlines for engineer buildings and the map structure in the form of white lines. I also cannot hear the sound of gunfire and explosions. Is there anything I can do to fix this?