Won’t Start Up
Quick Check
Symptoms | Quick Check | ||
|
|
| |
Won’t Start Up | 1. | Isolate OS by starting up from original install | |
• No startup chime |
| media for the computer, the same make and | |
• Error tones during startup. |
| model computer in Target Disk Mode, or | |
| compatible | ||
• Grey screen with fan noise, or |
| ||
| Both AirPort and Bluetooth services are available | ||
other noise. |
| ||
| when booted from the Install disk. | ||
• Will not progress beyond |
| ||
2. | Reset SMC and PRAM to clear any stored, | ||
Apple logo or spinning gear. | |||
| corrupted information. | ||
|
| ||
| 3. | Start up in Safe Mode by holding the shift key | |
|
| down during startup to load only required kernel | |
|
| extensions and disable all startup and login | |
|
| items. See KBase article | |
|
| http://support.apple.com/kb/HT1564 | |
| 4. | If system generates error tones there may be an | |
|
| issue with the SDRAM. See KBase article | |
|
| http://support.apple.com/kb/HT2341 | |
| 5. | Identifying when in the startup process the | |
|
| computer hangs can help isolate the issue. | |
|
| See KBase article | |
|
| http://support.apple.com/kb/HT2674 | |
|
| for information on the Macintosh startup | |
|
| sequence, error codes and symbols used. | |
|
|
| |
Deep Dive
Check | Result | Action | Code | |
|
|
|
|
|
1. | Boot the computer to Apple | Yes | Run the extended tests |
|
| Hardware Test on the Install |
| and proceed with results. If |
|
| DVD. Does the computer boot |
| AHT passes or boots with a |
|
| up to this volume? |
| memory error, go to step 2. |
|
|
|
|
|
|
|
| No | Go to step 2. |
|
|
|
|
|
|
2. | Remove the installed SDRAM, | Yes | SDRAM issue. Replace SDRAM. | X02 |
| and test with |
| Issue resolved. |
|
| SDRAM. Does the computer |
|
|
|
| No | Go to step 3. |
| |
| startup properly now? |
| ||
|
|
|
|
|
Mac mini (Late 2009) Symptom Charts — Startup and Power 20 |
