A dead or dying PRAM battery can prevent a Mac from booting or cause erratic behavior. 08/28/2017 by A guilla. Thanks for your guidance. This can indicate a corrupt installation of Mac OS X or a failed (or failing) hard drive. A too-weak or dead battery on most any Mac can cause booting problems. Listening to your computer may seem a bit metaphysical, but can provide helpful clues to startup problems. David – Submitted on 2010/07/24 at 3:31 am Intel Macs can also boot from a USB flash drive which contains a bootable disk image, this can be very handy in an emergency. Rating: 5/5 PRAM battery for Mac Mini 2012 December 8, 2019 Installed new PRAM battery into Mac Mini 2012 while I was installed OWC SSD and RAM. Don’t laugh but I have an old machine from 90s running 8.6 that still does some useful stuff.
Kind Regards Adam Rosen – Submitted on 2010/08/16 at 9:19 am the screen remains black and the power light fades in and out slowly like in sleep mode. Kacey – Submitted on 2010/08/27 at 11:23 pm iMac G4, iMac G3 - Underside of the iMac. Software now dominates the startup process. The Mac’s distinctive startup chime is more than an aural brand, it indicates a successful hardware (POST) test.
In your previous Topic from 2 days ago, you indicated that you have already replaced the battery. That’s usually a capacitor which has given up the ghost and burst open. You can also use a clone of your Mac hard drive to boot a cantankerous system. Mac OS X (10.4.11), Apr 4, 2012 11:14 AM in response to iHack501 Turned out to be the hard drive temp sensor. Have any ideas? 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. My PowerMac G4 MDD (2003) is eating internal batteries. I recently tried to change the permissions on the main OS drive where you click get info and allow everyone to read and write and I applied it to all enclosed items…what happened was a series of windows saying such and such software was improperly installed please reinstall it…, I had to click ok for 2 straight minutes… so I tried repairing disk permissions while it was still running…it would just kick up the same windows as mentioned above and stall the permissions task… so I tried to restart the computer…, It wouldn’t successfully start, it gets to the apple logo with the wheel going…, I’ve tried start up on install disk which works but disk repair says volume is OK, same with disk permissions, entering some terminal commands, I have not successfully got safe boot working, once it gets past the loading bar it goes to staying on the gray logo screen forever…. I have so much work to do but I can not trust my machine.
A too-weak or dead battery on most any Mac can cause booting problems. Here is the backside of the logic board where you'll see the Panasonic battery - 27" iMac. A pass through the excellent DiskWarrior utility is highly recommended for any disk-related startup problems. —–
This time was no exception. Twice now I have opened my computer (already powered on) and the password/login screen never popped up. Thanks so much In response to iHack501, "I checked the existing battery (which had never been replaced, as it was dated 11-1998) and it was completely dead. Rebooting your Mac in Safe Mode can sometimes get things working well-enough that a second, normal reboot then works normally Hold down the Shift key at startup to boot in Safe Mode. I am not that computer literate but have tried searching through the Apple help menus to no avail. When the Apple Logo appears your Mac has found a valid system disk, and Mac OS X begins loading. I don’t have original install disks for 8.5/6 now as lost in various house moves, and to buy it costs about as much as a new old mac ha ha. Once the date/time reset alert popped up and I didn’t really know what to do about it so I didn’t do anything. If the logic board truly was bad, would I be able to do anything whether the drive was mounted interal or externally? I checked the existing battery (which had never been replaced, as it was dated 11-1998) and it was completely dead. A $24 part if ordered off the internet.
What s wrong with my computer? —– What is actually wrong and how much do you think it will cost to fix? iHack501, Apr 4, 2012 11:14 AM in response to iHack501, Apr 4, 2012 11:30 AM in response to Klaus1, User profile for user: What is going on? Replace the battery. © 2020 iFixit — Licensed under Creative Commons — Privacy —
Hi, I have a quick question and am hoping someone might me able to help?!
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