MBP Startup impossible

[k66]

This is a MBP 17 "unibody 2008/09, bought used.

It worked well at first and some times it stopped spontaneously (rare). The battery held for hours.

It is always connected to the mains:

7 days ago, the battery has remained at 43% (according to display) after 2 days 16% and 0%. His green lights flash 4 times.
I disconnected the battery,

At startup, it appears at the bottom a progress bar for 10 minutes and then stop everything. It appears under the spinning wheel under the black apple, all in gray screen.
Startup impossible. Access impossible.
...

Good ideas?
Thank you to orientate myself.

 

[pm-r]

Do you have the Install Disks for that MBPro you could try using to boot from?

If so and that works, then you've got something goofy with the installed OS.

 

[pigoo3]

His green lights flash 4 times…

What does this mean? What lights flash 4 times?

At startup, it appears at the bottom a progress bar for 10 minutes and then stop everything. It appears under the spinning wheel under the black apple, all in gray screen.

What is "it"??

- Nick

 

[k66]

Thanks all.

The MBP works on Mavericks. I haven't disk to start.

Battery's green lights flash 4 times. Don't main now, the battery is disconnected.

Nick:
"
At startup, it appears at the bottom a progress bar for 10 minutes and then stop everything. It appears under the spinning wheel under the black apple, all in gray screen.
What is "it"??
It is the progress bar, that appears in the beginning.

What else?

 

[pm-r]

???? I'm lost so it's all your's Nick.

At least it sounds like it's all working.

Patrick
======

 

[pigoo3]

???? I'm lost so it's all your's Nick.

Ha ha…thanks buddy!!

- Nick

 

[pigoo3]

The MBP works on Mavericks. I haven't disk to start.

Battery's green lights flash 4 times. Don't main now, the battery is disconnected.

It is the progress bar, that appears in the beginning.

What else?

Here is a possible explanation for why you're seeing the progress bar:

When Safe Boot won't boot | Macworld

- Nick

 

[pm-r]

Here is a possible explanation for why you're seeing the progress bar:

When Safe Boot won't boot | Macworld

- Nick

That a good hunch and a logical explanation Nick, and a good catch.