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Problems may be related to the power supply, battery, hard drive, logic board, OS corruption or an issue with a user account.. This is just one of the steps for the teardown procedure of the MacBook Air with Intel Processor.. A dead or dying PRAM battery can prevent a Mac from booting or cause erratic behavior.. Macs are reliable machines, but like many of us they get cranky from time to time.. If you don’t hear the chime but instead hear a single tone, a series of tones, or see blinking lights, your Mac is indicating a hardware problem.. Layer Based Grading Supplies can fail fully or partially – they may give some power to the fans and such but still not work properly.. Macs also have another battery, called the PRAM (or NV-RAM) battery, that saves things like network settings, choice of startup drive, etc.. Does it make any noise? Listening to your computer may seem a bit metaphysical, but can provide helpful clues to startup problems.. Fortunately this is easy to test for: shut down the computer, remove one RAM DIMM at a time (remove in pairs on the Mac Pro or PowerMac G5), then reboot.. This may be the logic board, bad RAM, the power manager, a video card, etc Bad RAM can be a common culprit – on newer Macs, a blinking sequence of lights at startup can indicate this condition.. Some people have had success a to fix this problem, but I haven’t tried this method myself.. These components are inexpensive to replace Mac startup tones and blinking lights The Mac’s distinctive is more than an aural brand, it indicates a successful hardware (POST) test.. If your Mac doesn’t make any noise at all when switching it on, or if you hear the fans running but nothing else, you may again have a power supply or logic board failure.. The following questions are helpful to narrow down the cause of your Mac’s lethargy: Does the system turn on? If your Mac won’t power on at all, likely suspects are a failed power supply, a bad logic board, a blown fuse (on desktops), a dead battery or a bad AC adapter (on portables).. This can indicate a failed or failing hard drive Sometimes switching on/off a few times can help, but don’t push things under these circumstances.. Sometimes a Mac will power on but the hard drive will squeal, whine very loudly or make ticking sounds.. Isolating where the problem is occurring is key to finding the solution Unplug any external peripherals (disk drives, printer, etc.. By • 4:00 am, July 23, 2010 • • Clues to the causes of Mac startup problems can be found by analyzing when in the boot process the system fails.. Sometimes plugging in the computer and letting it sit for 30-60 minutes recharges the battery enough to permit booting.. Repair a MacBook Air - Logic board removal In this PowerBook Medic video tutorial, learn how to remove the logic board from a MacBook Air laptop.. ) to help narrow down the cause This post is sponsored by MacPaw, maker of CleanMyMac.. Fortunately a power supply or AC adapter is relatively inexpensive to replace Laptops have an additional power supply in the battery.. A groaning or buzzing sound that revs up and down at low RPM (and sounds like a wounded animal) could be a fan undergoing a slow death.. For laptops that have removable batteries (a dying Apple breed) remove the battery and unplug the computer when troubleshooting.. Failed power supplies are sometimes accompanied by a popping sound That’s usually a capacitor which has given up the ghost and burst open.. IMac G5 systems frequently suffer from bad power supplies Color finale mac torrent.. A dead or defective battery can prevent your MacBook or PowerBook from booting, or the battery may keep your system running after a crash, unable to reboot.. If the date and time reset each time you unplug the Mac you need a new PRAM battery.. If you have to resort to these types of tricks to get your disk working, copy any important data off a disk immediately when it’s accessible to be safe.. Leaving a failing drive struggling too long can cause further damage If you have a very old Mac with a non-spinning hard drive, more drastic measures may be required.
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