Since you can play the game, that means the monitor is communicating its EDID with the mpu letting it know it is there and what resolutions it supports. So that means that the control board is powered up. The next step is to see if you have an A/D problem. If you pull the vga cable from the monitor and power up, do you get the "no signal" message on the display? If you don't, you probably have an inverter or the CCFL bulbs that provide the backlight are blown. You could try finding the inverter to see if it fixes the issue, or you could replace the ccfl tube. The cost of these monitors is such that it is probably cheaper to replace it with a known working one. If you do get the no signal message on the monitor, you can probably recap your A/D board and it will come back to life.