It could be hard disk or something, the macbook wont turn on. I dont suspect harddisk though. I would like to back up the data from my hard drive. I am going to open it but can someone guide me how to interface it to my other Laptop (Windows) via us or other means, how to interface it to retrieve my data, assuming that the hard disk is ok.
If it won't turn on at all, you will need to remove the drive and connect it to a USB to SATA dongle/enclosure.
This will provide a physical interface to the drive, but unfortunately Windows doesn't natively speak HFS+, which is the file system on your mac drive. You might be able to use hfsexplorer to read the data from the drive.