Hi Chupa,
thanks for your reply. I did not mess with the laptop, in fact I didnt do anything with it so far, not even installed Skype or something. Was in contact with Gearbest already, they only could offer me to send it back to China or Spain on my own shipping costs (not that cheap). There is no sticker on the back, but I dont really wanna touch the inside parts and/or cables. I will try to get some help at a computer repairshop back in Austria. Do you have any idea what might be the standard cause of these problems? Really just weak cablework, or a defective power unit or so?
Regards, Jango