Replaced lower case and hard drive, now no power except fans.
I replaced the lower case and hard drive on my MacBook Pro Core Duo (A1150). When I connect the battery, the fans begin to run and don't stop. The power button does nothing and nothing else seems to be active at all. It's like the unit is off, except the fans. It does not do it when I connect the AC adapter, only the battery. And the light on the AC adapter does not turn on. When the battery is not connected, plugging in the AC adapter does not make the fans go on. Did I damage the I/O Board?
Is this a good question?