I have a Asus S550c that does the same as in with a charged battery it will work and charging light comes on but not charging. as soon as the battery dies the laptop dies. Won't power on with charger and no battery. can you help me? I found a short with mosfet A5 VNF 000x21 and don't know where I can find a replacement or buy any. I noticed you use a lot of donor boards for parts.