Original post by: Carsten Dahl Hjarup ,
Hi Sudeep Chatterjee, Just to be sure i would make a hardware reset.. I have had similar issue where either charged battery or AC-adapter is accepted and Laptop will not start. Does Caps Lock flash? and do Power button flash in a pattern? This did help me to get it started. Unplug the power cord --> Remove the battery --> Hold the power button for 60 seconds --> Connect the power supply then try to switch ON the laptop and later put the battery back into the laptop.