Will a mechanic be able to fix this (for good)?

Hello. I drive a 2005 Honda Accord Coupe. My LCD screen flicks or stays on when
cars locked and off. Sometimes when I go to my car after work or in the morning the
LCD clock and or light will be on. The last 3 days it was on every time and it seemed
harder and harder to start my car. Today my car would not start at all. I turn the key
and there's 1 faint click. The lights and radio come on if I don't turn the key all the way.
Also, my passenger window is screwed up. It will make the sound like a passenger
clicked the window roll down button when no one clicked it. When I hear it, I can no
longer roll down that window. It will click again in a few minutes allowing me to roll it up
or down. Is that problem causing the overall problem that caused my car to die? (If
not, what is?)