Mother manaul samsung laptop np305v5a-a0dus

There is no manual for the motherboard available on site and when I ask about one they tell me they do not offer it to consumer's. Samsung has really stuck it me about my laptop. They sold me a new board and after I replaced it . It still did not work, so they told me to ship it to them because it was still under warranty. Now they are telling that because I changed the board the warranty is no good. I have to pay there third party Co. to get it fix. There is no manual for the motherboard available on site and when I ask about one they tell me they do not offer it to consumer's. Samsung has really stuck it me about my laptop. They sold me a new board and after I replaced it . It still did not work, so they told me to ship it to them because it was still under warranty. Now they are telling that because I changed the board the warranty is no good. I have to pay there third party Co. to get it fix.