SMC/Battery or Logic Board problem? Strange behavior.
Hello, everyone!
I am with a strange problem in my dad's macbook pro mid 2009.
When I boot it with the battery plugged in, it simply doesn't light out the screen backlight. For a moment I thought this could be the WLED chip that blew, but then I unscrew the bottom tamp, removed the battery, unplugged and plugged again the magsafe... voila! It stars again with everything working except the backlight keyboard (funny because in the startup, it blinks).
But then I turn off, plug the battery in and sometimes it starts normally, sometimes not. but certainly on the next day, it gives me the exact same problem and I have to do everything again. Worth saying that if I perform a SMC reset nothing happens.
I am doing it everyday for the past three weeks. I thought it could be a faulty RAM, I changed it and nothing. If I start with the battery plugged in, I can only use the computer with an external monitor "normally".
I think it could be some problem with the SMC, but apparently there's no other version for me to flash.
Can someone please give me any sign of light?
Is this a good question?
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5 Comments
and I found out... If i restart the computer (without the battery plugged), it goes the same way. I have to unplug and plug the magsafe to get it back.
by abtremarin
Can you tell us what light/s you are speaking about? Is it the MagSafe cord LED (Green/Orange). The battery checker LED's (8 little Green LED's) along the left front side of the case when you press the battery checker. Or, the Sleep light (White LED on front). The keyboard backlight LED's (White).
by Dan
the screen backlight.
by abtremarin
Thanks for your clarifications Thats what I had thought. Some of your now edited question didn't quite make sense the first time.
by Dan
I have absolutely no idea what could can cause this. Even with the battery off, If I restart the computer it gives me the same problem.
by abtremarin