I work as an IT Administrator at a school and deployed Lenovo G560's to 50 students. They have worked properly for a school year, but now, after two school years (and the warranty is up), there appears to be a power problem that is inevitable.
Symptoms: You press the power button and the power, battery, and hard drive lights turn on like it is booting normally, then after a minute or two it will turn off again.
It appears that this defect happens after the student puts so many hours on the machine. I am not sure if this is the case, but that is what it appears.
I have tried reseating the RAM, replacing the processor, replacing the hard drive, and pressing the power button with the battery out with no avail.
If anyone has any suggestions please let me know. Thanks.