This can be a computer user’s worst nightmare. You hit the power button and nothing happens. Any number of things can cause this computer problem — it may be something as simple as a loose cord, or as serious as a dead power supply or a faulty motherboard.

Another common PC problem is when the computer turns on and the fan and lights come on, but the machine doesn’t boot, or shows a blank screen. This could be anything from a dead (or unplugged) monitor to a dead hard drive or corrupted boot sector.

Fixing the above issues sometimes could just be plain and simple old common sense which is to to simply check and make sure that all connections are properly done, (sounds weired?) I’ve been called out to hardware support jobs only to find out that a wall socket was not turned on so as much as possible make sure all connections are checked before proceeding to call support or arrive at dreadful conclusions.

So what do you do?

When faced with a computer that won’t start most people tend to panic, worried that all the data on their PC is gone forever.
It’s true that the most common reason a computer won’t start is because a piece of hardware has failed or is causing a problem but that hardware isn’t usually a hard drive, the part of your computer that stores all of your files.
In other words, your music, documents, emails, and videos are probably still safe – just not accessible at the moment.
So take a deep breath and try to relax. 
The first thing to do at this point is to look for a hard drive enclosure t