Apple 24-inch mid 2007 manual Hard Drive Issues, System hangs during normal startup process

Hard Drive Issues

Note: The following information is for Intel-based and PPC Macintosh drive compatibility

•Drives to be used in booting Intel-based Macintosh hardware should be formatted and partitioned with an Intel-based Macintosh disk utility running on Intel-based Macintosh hardware. That should ensure you get the correct default partition map and structure for reliable booting.

•Intel-based Macintosh CPUs in Target Disc Mode will only mount on PPC machines running Mac OS X 10.4.10 or later, and may show one contiguous partition rather than separate partitions on the host machine.

•Always make sure to use the OS that came with the machine if you need to reinstall software

(ask the customer for the discs if necessary), and the diagnostics specifically designated for that hardware.

System hangs during normal startup process.

1.Make sure all software updates have been applied to the computer. Refer to KBase article 303903, Intel-based iMac: Installing available updates , and to Apple Downloads for all available updates for the iMac (Mid 2007) model of computers. If this doesn’t solve the issue, go on to the next step.

2.Boot from the system CD that came with the computer. Use Disk Utility to verify the hard drive.

3.Using Disk Utility, reformat the hard drive.

4.Check all cable connections to and from the hard drive.

5.Replace the hard drive data cable.

6.Replace the hard drive.

7.Replace the logic board.

Fails Apple Hardware Test for HD Temp Sensor, System Noisy

1.Make sure the LCD temp sensor cable is connected to the sensor on the back of the LCD panel.

2.Make sure the LCD temp sensor cable is fully inserted into the connector on the bottom left side of the logic board.

iMac (24-inch Mid 2007) Take Apart — Symptom Charts  219