2010 13" MBP Wont boot from internal. Will boot from external

This is fairly long winded, I will try to be as clear as i can.
Last week my 13" MBP refused to boot after running out of battery during sleep.
I have done the following to the original drive:
Booted from Lion Recovery, repaired, verified, and repaired/verified permissions.
Booted from Snow Leopard DVD, done the above.
Used Disk Utility on another Mac, done the above.
The drive still will not boot from the internal cable.
I can see the drive when attached internally, but cannot do any of the above actions as it is "unable to unmount"
I can boot from the drive if I use a USB external adaptor.
I bought a new hard drive....
I have done all the same on the new HDD with additionaly installing fresh Lion / Snow Leopard to the new drive whilst its in the internal position (Leopard from the DVD originating with my laptop, Lion from Lion Recovery whilst the other drive was on USB) but still having the same problem when it comes to booting - i.e. wont boot from internal. will boot from external USB.
Ideally I would like to end up with a lean install of lion, on the new hdd, booting from inside the laptop.
Please help, this is driving me mad.

I think you have solved your own problem. If you have two different HD's and they both do not work once connected, but do when placed in an external enclosure, then I would think it has something to do with the connection.
Slap the old drive back in the machine, and take it to the genius bar, and have them diagnose it. Hopefully they will have an answer for you. If not, bring the other drive too inside he external enclosure, and show them that it boots via the external.
Then, lay the whammy on them, and tell them that the original drive works inside the enclosure too.
Would be interesting to know what the actual issue is, and the resolution as well...

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This is really quite simple.
There are two possibilities here only:
1. You keep opening the same Library.
or
2. You failed to make a copy at all.
Stop doing this:
I am opening both by double clicking on my internal or my external
Do this instead:
Hold down the option (or alt) key key and launch iPhoto. From the resulting menu select 'Choose Library'
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Gents, truly, thank you.
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I swapped in a known-good Airport card from another iBook G4 and put this one's in that iBook. That computer wouldn't start and this one started up no problem (and I'm posting from it).
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Won't boot from internal HD

Hi guys, my MacBook won't boot from internal HD. The boot up chimes without Apple Logo and ends in a question mark folder.
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I deleted a folder called “usr” with many other folders like “x11” in it from Volume/Macintosh HD. I couldn't launch iTunes afterward so I shut down and stuck with the shut down wheel spinning screen, so I force shut down and restart.
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Although it's possible the hard drive has failed, it's more likely that system files have been damaged. The question mark means no bootable system was found. Before throwing in the towel you might try the following:
How to Perform an Archive and Install
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Repairing the Hard Drive and Permissions
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3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
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5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
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G5 will not boot from system disk or from Tech Tool Pro 5

Hi everyone - Having a bit of trouble and hoped I might find some answers here.
I suspect my system drive was having some issues as it sounded like it was being taxed and strained as I would open up applications from it. Upon verifying the disk using Disk Utilities, the test would stop short with the following message:
First Aid Failed
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Is there an alternate way to boot the computer from Tech Tool Pro or the original start up disks? I'm having no luck, here.
I'm on my way into town to purchase a new internal drive (something with about 1TB of space) so that my pro apps can swim a little instead of being being bogged down on a 250G drive.
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Oh yeah.... Happy New Year to everyone!!
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Will not boot to internal HD.

A friend's macbook (10.5) will not boot up. I booted it to my clone. I was able to read the files on the internal, but when I copied them, all of the files have a red minus symbol. I want to copy the whole internal and reinstall the system with install disk and restore from backup. I assume this is a permissions issue, but I do not know what to do.

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