Thanks for the info Asa/NightArh.

@Asa: I'm pretty sure the problem is my GFX card in some way: I get 3 beeps (long - short - short) and a blank screen. According to my research this means GFX issues...
I will try your battery suggestion and hope for the best

I know I can get it repaired but I have 150Gb of music on there and I don't want to lose it, my music collection is my life

Cola-flavoured whaaaaaat?? How the bloody hell? Sounds funky