well... your cheapest option would be to buy a new inverter board and inverter cable off ebay and try that... that should cost $30 max. If that works, then your good, if not then you might need to replace the LCD, which is more expensive, or it could be a logic board problem. However, like I said, try a new inverter + cable first, then proceed to more expensive options. The fact that the desktop is there tells you that the LVDS cable is fine.