The fact that your not getting past the second of 4 lights leads me to believe your only receiving partial power from the power supply . Inspect the power supply for blown capacitors.Test the power output at the power supply disconnected from the board and make your determination from your results against the proper output levels. If you get proper readings from the power supply and it boots OK with the LCD disconnected i would tend to agree that the problem is the LCD. But once again make sure your getting a proper test from the power supply before replacing the LCD .Hope this helps