The MacBook family was first introduced in May 2006 and replaced the iBook as Apple's consumer laptop.

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MacBook will not boot, stuck on grey screen

So my friend asked me if I could fix her 2008 Penryn Macbook. The LCD screen was broken and it also needed a new keyboard, but apparently booted and worked fine.

Basically, I took the whole thing apart, following the guides to replace the LCD screen. I replaced the screen and the LCD brackets as I realized that one of airport antenna cords was torn. I also bought a new screw set because there were many screws missing and I read that many of them were crucial for the computer to run (they were needed to complete the circuit). I also replaced the keyboard.

I double-checked that everything was plugged in correctly (including the RAM). When I turned it on it sounds the chime and then shows the grey screen. There is no Apple Logo or spinning wheel. I also realized that the computer now requires to be plugged in at all times or it will shut down- don't believe that was an issue before). I tried every startup key combination and reset the NVRAM.

After this I decided to try to boot with a Snow Leopard Install disk (even though this mac was probably running Leopard (10.5.x) and then after that a Tiger Install disk and neither worked. I don't have a Leopard disk, but if this is crucial I might be able to get my hands on one.

Interestingly, the only startup keyboard shortcut that garnered any response, besides resetting the NVRAM and ejecting the install disks, was when I held the option key- the mouse would appear.

At this point, I need all the help I can get. I'm really no expert at all and I'm terribly afraid that I will have to just sell it on eBay and buy her another computer.

Thanks in advance for all the advice!

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Maybe one of these tips will work for ya:

-Take the RAM out and try re-seating it.

-Replace the RAM with working RAM

-Reset PRAM

-Try booting up with the power cord plugged in and battery installed

-Try booting up with power cord unplugged and just battery installed

-Try booting up with power cord plugged in and battery taken out

-Get a firewire cord and plug your MacPro into the dead Macbook and boot the Macbook in Target disk mode. Then on your MacPro go into Disk Utilities and repair disk permissions and repair disk on the Macbook hard drive. Then power down both computers and power up the Macbook and see if that works.

-Replace the hard drive with a good working hard drive and operating system.

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