When it starts up a Mac runs tests to check the hardware. It beeps to indicate where a problem may occur. 3 beeps indicates a problem with the memory. It is usually advisable to have an Apple service shop have a look at any Mac that is beeping at startup.
If it's an iMac, you need new RAM or the RAM needs to be taken out and put back in.
If its a Windows PC (any kind XP, 7 etc.) the RAM needs to be replaced immediately.
The 3 beeps of your iMac is meaning "No good RAM banks", then a Vacuum Cleaner like noise turns on. Here is how to fix this problem:
Step 1. ~ Loosen the 3 screws where the speaker isStep 2. ~ Locate the 2 RAM chips on the side of the mac.Step 3. ~ Take out the RAM and put it back in.(put back in CAREFULLY!)Step 4. ~ Put the casing back on and re-tighten the 3 screws where the speaker is.Step 5. ~ After when you did these steps, your iMac MODEL SHOULD be up and running with the iMac introduction noise.Step 6. ~ You're done!
Hope this information helps you!
When a Mac beeps at startup it indicates that there is a problem. The problem usually relates to the RAM memory modules which may have worked loose and just need pushing back in firmly. The solution will depend on the type of Mac/Mac OS and the number of beeps. (See links below)
Beeps at start up indicate that something is wrong. Often it is a bad memory module, possibly not pushed in tight enough to form a solid connection. (See links below)
Beeps (usually 3) most of the time mean a ram problem flashes use to mean a motherboard problem http://www.apple.com/support/macmini/
press on startup to display the bootable disks.
What do you mean?If your mac is loading slow on startup, it is most likelyto do with its SSD; so I'd recommend getting that checked out, or clearing up some space :)
The Mac's Startup Chime tells you that your Mac is working properly. If it changes to some other sound then there is a problem with your Mac. You can press the mute sound key before you shutdown the Mac then it will startup still muted or there are a several pieces of software, such as Psst (see link below), that will silence the chime for you.
The fix could be that you are using the wrong startup disk. When you turn your PC or mac on press f1 repeatedly until you come to the startup menu. From this select 'startup' preferences, start up disk and select the right one. If you are unsure there is no harm in trying them all as i doubt you will have more than 2 hard disks.
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To select which partition the Mac boots from hold down the Option key (alt) when you start up. In System Preferences select Startup Disk and then select the system you want to set as the default startup.
Restart your computer, then hold the Option (Alt) key as it starts up. Or, use the Startup Disk control panel in Windows or Mac OS X Startup Disk preferences to set the default operating system to use each time the computer starts up.
insert the Leopard CD into your mac. Turn it on, after you hear the startup tone, hold down the C key, which will cause the mac to boot using the leopard CD. once it is booted, it will walk you through reinstalling Mac OS X.
Holding down the option key while starting up a Mac running Mac OS X enters the Startup Manager which will let you select where you want to boot from.