Dell Inspiron 3520 restarted now doesn't boot up when I turn power on and makes 3 beeps, help?!

[Ellieb1996]

Last night my laptop worked normally then an error message appeared saying it needed to restart and would do so automatically. It then wouldn't turn on.. Fans were on but very quietly and screen was blank. Few more tries of this and then 3 beeps can be heard.. What does is mean!?
I left over night as it may have been overheating and the fans can be heard louder this morning but still nothing on the screen and still beeps.
I unplugged power cable and battery and held power button down for 30 seconds and it did nothing.

Somebody please tell me what to do

 

[rieverjohn]

Can't remember how many but bleeps shortly after switch on usually means a memory problem. If you have more than one memory stack in your laptop, try removing one at a time and trying a boot with each one in turn in slot one. If you only have one, re-seating may sort your problem.