Chosen Solution
Hey I’m sorry if this question has been answered before. My screen went black, but I could see a tiny % of the background and when turning display off and on it would be normal and go black again. I read about what might have caused it, so decided to change the inverter cable, but that didn’t help. Is the problem then the inverter board or display itself?
Samierdogan - Your issue is some where in the backlight circuit. In your model it uses CFL lamps (Compact fluorescent lamp). The fact you can see a faint image on the screen tells us the video services are working. These CFL light sources require high voltages to cause the Mercury gas inside to get to the state of plasma then the UV light it creates hits the phosphor causing it to glow. This is were the inverter circuit pumps up the voltage. More often the inverter & inverter cable harness has failed. While the CFL lamps do wear out you would have noticed the display being darker on one side or flickering before it fully going out. I would start first by resetting the SMC and PRAM. Follow these steps: Intel-based Macs: Resetting the System Management Controller (SMC)OS X Mavericks: Reset your computer’s PRAM If these didn’t fix the issue I would start with swapping out the inverter & inverter cable harness as the CFL’s are a much bigger job.
the problem can be the inverter board or the display. In my experience it is almost always the LCD panel. I have seen it be the inverter board/cable but again, it is very rare maybe 1 in 20.
