So one day the kids tell me the the Tetris machine won't work. Here are the Symptoms: -Marquee goes on. -I tested the power supply and confirmed +5V. (was actually 4.98 and I adjusted to 5.00) -The monitor is on as I can see the orange glow. However, there is no picture displayed. -The monitor is humming super loud. Far louder than before. -I see two LEDs light up on the game PCB. -I can't play a game. I tried to start a game and there is no sound or display. -I noticed the ground was loose on the power supply, so I tightened it. Things still did not work. -I also tried to re-seat all the connectors (no change) -I'm thinking of re-capping the monitor, but I am guessing at this point. -I'm a bit new to arcade machines (I know pinball, not arcades). What would the systematic approach be at this case. Should I test monitor voltages? Thanks in advance!