Troubleshoot: Laptop Cannot Start

'My laptop cannot start after press start button', that's the famous problem nowdays, I also have same problem with 2 or 3 laptop this month. How to solve this problem? Follow this step to troubleshoot in DIY before you decide to send your laptop at repairing shop./* make sure turn off electrical power first for safety before or after what you did */STEP 1:1. Unlock battery and pull out the