Don't trade your Express for a bit of nothing just yet - it probably only has a few tired capacitors. Dead caps are a common culprit when it comes to low sound issues, and they might be causing your blank screen as well. My TE screen is blank after long periods of neglect, but after a few minutes it gradually brightens up and is back to normal. I'm guessing that this is caused by the caps not being able to hold a charge and then slowly reviving, but I'm no electronics wizard, so maybe not. Either way, it can't hurt to try leaving yours on for ten minutes to see if anything happens. If it is just a cap problem, you should be able to find someone with soldering skills that could fix it for you.