Hard disk in mums macbook failed, bought a new one, formatted it first. Have tried starting it with every possible key and I either get flashing question mark folder or a cursor.

Five ways to eject a stuck CD or DVD from the optical drive

Ejecting the stuck disc can usually be done in one of the following ways:

1. Restart the computer and after the chime press and hold down the

left mouse button until the disc ejects.

2. Press the Eject button on your keyboard.

3. Click on the Eject button in the menubar.

4. Press COMMAND-E.

5. If none of the above work try this: Open the Terminal application in

your Utilities folder. At the prompt enter or paste the following:

/usr/bin/drutil eject

If this fails then try this:

Boot the computer into Single-user Mode. At the prompt enter the same command as used above. To restart the computer enter "reboot" at the prompt without quotes.

If you have a 2010 MBP or later, then you can use Internet Recovery. Start by rebooting the computer. At the chime press and hold down the COMMAND-OPTION-R keys until a Globe appears in the upper part of the screen. This process can take upwards of 15 minutes to get connected to the Apple network servers. You should eventually see the utility screen of the Recovery HD. You may now go about the process to install Mountain Lion:

Install Lion/Mountain Lion on a New HDD/SDD

Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.

Boot to the Internet Recovery HD:

Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.

Partition and Format the hard drive:

1. Select Disk Utility from the main menu and click on the Continue button.

2. After DU loads select your external hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.

3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.

Reinstall Lion/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button. Be sure to select the correct drive to use if you have more than one.

Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Then you need an installer DVD. Either the ones that came with the computer when new or you can purchase a retail Snow Leopard DVD:

You can purchase Snow Leopard through the Apple Store:Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.

After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements.

However, if you cannot turn on the computer then you have a major hardware problem and need to take it in for repair.

Did you read through:

However, if you cannot turn on the computer then you have a major hardware problem and need to take it in for repair.

Look, you stated earlier, "I can't turn it on so there is no menu bar and I can't get into terminal." I take that to mean it won't power up. There's nothing you can do if that's the case. If you misstated then you need the discs I stated earlier:

Then you need an installer DVD. Either the ones that came with the computer when new or you can purchase a retail Snow Leopard DVD:

You can purchase Snow Leopard through the Apple Store:Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.

After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements.

Use the option I provided. Buy the disc and see if you can install Snow Leopard. You cannot do anything until you can eject the disc that's in your computer. Since none of the options helped I would take it in for repair.