Macbook HDD dead

I have a white 2009 13" macbook, it boots ok from external drives, but the internal drive is totally dead, no noise or vibration, i have tried another HDD that is the same, i have tried both drives in usb enclosure and they both fire up but are not recognised. Does the fact that they don't even fire up in the macbook point to a fault with the macbook, would they still fire up but not be recognised, or not fire up at all. Any advice would be much appreciated, as i don't want to waste money buying a new drive for that not to work either.

I think it unlikely that a drive fault would cause the disk to not spin (given that it does so in an external enclosure). Even less likely that two drives would do the same. I think it's time to take it to a repair shop (one that knows about Macs!) or Apple Store and get an estimate on repair costs. It sounds like a fault on the m/b.

Edit: I should have added that you should try the normal boot troubleshooting first.

Edited by deleted (Thu 19-Dec-13 09:00:20)

Thank you, I did thought that might be the case, just needed a second opinion.