3 Shut off during startup
Hi,
I've a MBP 2009. With time, I have more and more difficulties to start the computer. When the computer is "cold" (no boot for some hours) and you press the power button, it tries to start (2-3secs), and then shut off. So I restart, again, again and again. With tries, it shut off later. Finally, I'm able to reach login screen. Then the computer is stable and I've no more shut off. I can keep it running during 24 hours without issues.
It's like the issue is happening when the computer is not "hot" or needs energy.
Thanks
Update (02/19/2018)
Here is the result :
It looks like the battery is fine ?
Update (02/27/2018)
Thanks @mayer. I replaced the battery with a new "genuine" one. Unfortunately, it doesn't solve the issue. It is still exactly the same. I'm also surprised that even with a new battery, if I unplug the magsafe, the computer shutdowns 2 or 3 seconds after that.
I'm now wondering if it's not an IC issue related to power on the logic board. Maybe you have some more hints ?
crwdns2934109:0crwdne2934109:0
1.1crwdns2936485:0crwdne2936485:0 
2.6crwdns2936485:0crwdne2936485:0 
crwdns2944067:04crwdne2944067:0
I notice that Coconut is showing a battery failure. I have the same machine on the bench now with a similar issue. But I also have the flu and unable to work on it yet. Will try to remember to get back to you with my finding in a couple of days. If I forget (highly probable, given the way I feel right now) shoot me a reminder in a few days.
crwdns2934271:0crwdnd2934271:0 mayer crwdne2934271:0
Thank you @mayer.
crwdns2934271:0crwdnd2934271:0 Guillaume crwdne2934271:0
Hello @mayer. Did you find a solution ? Thanks
crwdns2934271:0crwdnd2934271:0 Guillaume crwdne2934271:0
You replacement battery is showing a failure while the original one didn't.
crwdns2934271:0crwdnd2934271:0 mayer crwdne2934271:0