Mac Mini Late 2012

[markwilliams82]

Recently bought a Mac Mini and having a small problem with turning it on

If i push the power button, I get 3 short beeps and flashes which it only recently started doing the last couple of power ons.
If I hold the power button down or pull the power lead and then turn on again, it will be fine.

What could be causing this and how can I get it repaired?

 

[markwilliams82]

Try reseating and swapping around but will try 1 at a time for now to see if still get the errors

 

[markwilliams82]

Looks like one of the stick of memory may be faulty; took one out last night and since then its been booting first time every time

Thanks