black screen

[alan and polly]

when i switch my computer on it

makes three loud beeps the nothing more. the screen does not come on although otherwise it seems to making the usual background sounds? does anybody have any idea on what has gone wrong?

my daughter was yesterday moving some music files onto her phone and that is the last time the computer has worked correctly.

[Plastic Nev]

Hi Alan and Polly, Welcome to Extreme Tech Support - Free PC Help

Can you tell us what make and model your computer is please as those beeps are a code as to what could be wrong, I suspect RAM, but may not be, as each manufacturer has different codes for faults, hence why we need to know.

Nev.