will a dead battery prevent an external power supply from booting a 2008 mac book pro?

Question

Level 1

8 points

will a dead battery prevent an external power supply from booting a 2008 mac book pro?

My 2008 Mac Book Pro stopped booting. I did a SMC reset, A PRAM reset and still no response.

Finally I took the ? dead battery out and hooked up the power supply and tried turning the power on and still nothing! I see a green color at the end of the PS but the computer will not boot?

My Question is: Will the power supply normally boot this computer if the battery is removed? And what should I do next?

thank you very much.

Posted on Aug 18, 2014 1:57 PM

Reply

Answer 1

Loner T

Level 9

59,536 points

Aug 18, 2014 2:10 PM in response to mesmd

The Mac should boot without battery. What happens when you press the little button on the battery?

Will it let you run Diagnostics with the D key or use the second Grey disk?

Reply

Answer 2

mesmd Author

Level 1

8 points

Aug 18, 2014 2:30 PM in response to Loner T

Loner,

My battery has no button that I can press? It is a model A1281. I believe it is dead, however, when removed and hooked up to external PS, the computer still will not boot. The green light remains on at the connection on the computer.

I have no second Grey Disk.

Reply

Answer 3

Loner T

Level 9

59,536 points

Aug 18, 2014 3:09 PM in response to mesmd

If this is the unibody one, the D key should let you bring up diagnostics.

If you disconnect / reconnect the battery from the logic board, and then power it up, does it power up?

Reply

Answer 4

OGELTHORPE

Level 9

57,329 points

Aug 18, 2014 3:27 PM in response to mesmd

The odds are your logic board has a serious problem. An appointment at an Apple store genius bar is your best option. The evaluation will be for FREE.

Ciao.

Reply

Answer 5

mesmd Author

Level 1

8 points

Aug 18, 2014 3:56 PM in response to OGELTHORPE

Loner, I tried the reset and D, etc,. and boot, etc.Still no power or anything other than a green light at the computer plugin site!

Ogel Thorpe I bet you are correct? If so, my HD info. will be safe and I will need a new logic board? How much do you think this should cost and maybe I should use this towards a new Mac Book Pro?

Thanks so much to all of you for your quick replies and help!

Miles

Reply

Answer 6

OGELTHORPE

Level 9

57,329 points

Aug 18, 2014 4:02 PM in response to mesmd

More often than not the HDD will be intact. You can install it in an enclosure and connect it to another Mac and see if your data is still there.

Logic board replacements are expensive. I have seen them priced at $700-$800. You will be given an exact quote if that is found to be necessary. At the very east you will be in a position to make an informed decision.

Ciao.

Reply

Answer 7

mesmd Author

Level 1

8 points

Aug 18, 2014 11:24 PM in response to OGELTHORPE

Later this week, I will follow your advice and have the Genius Bar at Apple evaluate this problem.

Thanks, Ogel Thorpe.

Reply