After done research on this, I like to compile it here for the benefit of others encounter similar problem.
Best Solution is - Replace a new RAM or remove one RAM at a time to test whether the system is working and I found a faulty RAM that caused the system to hang and no display unable to boot up!
Overheating
Computers often shut down because they are overheated. This could be a result of several underlying problems. A malfunctioning fan could be the reason for the processor's excess heat. If the fan is turning too slowly or not at all, it may not take long for the temperature inside the computer to reach a point that will cause it to stop working and shut down. In these instances, a fan motor may need to be replaced, which can be done on your own or by taking it in to a computer repair technician.
Sometimes the problem is much simpler. The vents in your laptop are meant to allow air to circulate through the system in order to cool the processor. Over time, dust and debris may clog the vents if they are not regularly cleaned. The clogs prevent air from entering the vents and this may lead to overheating. Unless the heat has caused serious damage, cleaning the vents out may solve the problem and the laptop will work normally.
Power Supply
If the laptop computer suddenly shuts down, it could be because of a break in the power supply. If the laptop is plugged into an outlet for power, check to see if the plug was pulled from the socket and make sure the cord is properly connected to the computer.
Replace the power adaptor if it is able to run on battery mode.
If the laptop is running on battery power, then it is possible that the battery is drained and no longer has enough power to run the computer. A simple recharge of the laptop battery should fix the problem. Typically, a laptop has an indicator on the screen that tells how much battery life is left so that a shutdown is not a surprise.
RAM
For unexpected shutdown the system might be due to lack of memory or faulty RAM. When the storage area is very low and almost all the memory is fully utilized, the system might suddenly shut off. To avoid this issue you need to add additional RAM. This process increases the memory capacity of your system. You can also enhance the memory by deleting all unwanted files and cookies from your system.
Hard-Disk
When you face such sudden system shut down, check for whether your hard drive is damaged or not. If it is found to be damaged, you need to replace a new drive in the place of damaged hard drive to overcome sudden shutdown issue.
Schedule a hard-disk check and fixed error under hardware tools for disc property and defragmentation. I found one disk failed the defragmentation process!
Motherboard and Video card
Motherboard was fried and flaw with video card
Virus
Some computer viruses can cause the sudden shutdown of a computer. These destructive programs can be picked up online from websites that are untrustworthy or from downloading information contained in spam emails, among other sources.
Some had tried this and it works!
1) Took out the battery, then unplugged the main power source
2) Held down the power button for 30 seconds
3) Plugged in the main power source
4) Pressed the power button
5) Put in the battery
