Chosen Solution
My MacBook Aluminium Mid 2008 is not working. I’ve already change the LVDS cable and the display screen. The common things to do like press the cmd, option and P and R keys when booting don’t work. I don’t know what to do, I’ve seen a lot of people having the same problem but all of them have MacBooks where you can change the inverter board, I think that in my case this is not possible. I do not have the HDD installed (crashed), the Desktop is not visible even with a flashlight, the start up sound “tadaaa” is sounding normaly after I press the power button and that is it… The LCD screen is changing (more darker) and nothing else, the cpu fan is operating. Some suggestions? Harris p.s. My macbook is a 2.4GHz intel core 2 duo mid 2008, just MacBook aluminium (A1278), not the Pro version Thank’s The last four digits of my serial number are 5W7A THANK YOU !
Too many changing/wrong variables at once makes an impossible diagnostic puzzle. Without a LVDS cable, or any display an external monitor should work with a good logic board, bootable OS and a working Graphics Chip (GPU). ALL THREE must be “known” working items. From there you can diagnose the display issue. IF you have an LED display you’re right there is no inverter board, but a controller, aka “fuse” that controls the LED BACKLIGHTS. IF you put the wrong, or used LED display in the machine you have no way to eliminate the display as source of the problem. That being said there’s a higher incidence of BAD LVDS cables being the cause display issues than the controller or display (UNLESS YOU WET or DROPPED THE UNIT). If this answer is acceptable please remember to return and mark it.
Measure pins 21/22 of LVDS. 0v, 12.6v, or 27-40v? What do you get? Let’s go from there.
change fuse backlight marking (P)everything will back to normal.good luck!!✌
