Cannot log on to Macbook Pro 13 after battery gone dead and reacharged

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Cannot log on to Macbook Pro 13 after battery gone dead and reacharged

My MBP battery was dead for about 1.5 weeks. I charged it fully but now when I try to log on it doesn't seem to recongnize my password.

Also during start up, the spinning wheel appears as usual but also a progress bar that wasn't there prior ro dead battery. It only seems to progress about 30% of the way across before reverting to my login page.

Could I have damaged something by lettinbg the battery go dead for so long?

BTW the factory reset procedure doesn't seem to work. Should this procedure be executed from power off or power on mode?

Thanks

Mac Pro, Mac OS X (10.7.3)

Posted on Mar 13, 2012 10:38 AM

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Answer 1

Linc Davis

Level 10

209,547 points

Mar 13, 2012 10:53 AM in response to bealem

Back up all data, then boot from your recovery partition (command-R at startup), launch Disk Utility, select your startup volume, and run Repair Disk (not Repair Permissions.) If any problems are found, repeat.

There are several ways to back up a Mac that is unable to fully boot. You need an external hard drive to hold the backup data.

1. Boot from your recovery partition (10.7 or later), a local Time Machine backup volume (10.7.2 or later), or your installation disc (10.6.8 or earlier.) Launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”

How to back up and restore your files

2. If you have a working Mac, and both it and the non-working Mac have FireWire ports, boot the non-working Mac in target disk mode by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive.

How to use and troubleshoot FireWire target disk mode

3. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

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