Message d'origine par : arbaman ,
First try an SMC reset, by pressing left shift+option+command+power button together with magsafe plugged in, you should see magsafe amber light turning to green and back to amber. If that takes place correctly the logic board should be alive and magsafe should be working correctly. Maybe the battery got to a premature end, it happens with third party batteries earlier than sometimes expected. When you have the chance to open the bottom try unplugging the battery and see if the Mac is able to start without it. If it runs just replace the battery and all should be fine, otherwise something is wrong with the logic board and needs technical troubleshooting.