Macbook won't turn on

So I have had this macbook since 07 and it's had somewhat of a difficult life. It used to overheat quite often and shut down randomly so I used smcfancontrol to help with that. For the past year it has been fine...until now. Just recently I closed my macbook and then, when I reopened it, it wouldn't come to life again. I held down the power button to turn it off which it did. It hasn't turned back on since. When i press the power button the screen flashes white and then goes black again. I can hear the computer try to start up for about 5 seconds and then the hard drive clicks once and it all powers down. the white LED in front never comes on during any of this. When i take out the ram and try to turn it on the same thing happens so maybe it means that the ram is bad? maybe someone can help.

Welcome to the Forum. Try resetting the SMC see if that helps - Intel-based Macs: Resetting the System Management Controller (SMC)

Hmm that could mean that your hard drive has decided to quit