2 days back I went to a store in secundrabad( India)  I gave my laptop dell 5577 for general servicing and Cleaning, he said he will give it in a hour then I sat near by for an hour and after That he said u can go out and come as I did again I went out and come after a hour again after then he said brother the cleaning liquid went into the processor it will take time to dry come tomorrow I'll give it tomorrow he said I said OK then I went to the shop and asked again then he said brother your graphic processor is not working I don't know why, then I said it was working fine when I gave it to you then he said yeah that is why am taking this upon me and I'll stick new graphics card into motherbed then I asked him what if its damaged in a month after you replacing graphic processor??  Then he said I'll give you warranty and now he says oh d give me 2 days time I've ordered graphics card for you and I'll call you back when its delivered to me,  and then I did a research online like 'can we replace dell 5577 graphics card with the same one' I wasn't able to find the right answer but I came through some statements like graphics chips are soldered into motherboard so entire motherboard should be replaced which is very expensive (around 30k inr) so first of all I want to know that can the 1050m be replaced by a new 1050m?  And can I purchase a warranty if the chip Which he is going to stick in my Motherboard is genuine 1050m 

I know I did a mistake not taking it to a dell showroom and taking it to elsewhere 

But my laptop had loose hinges problem too and When I first went to dell showroom they said the body should be replaced, nothing can be done except that she they were sooo irresponsible in their words and also they said you d OK my have physical damage warranty which I don't even know that it exists,

so he said he'll fix hinges so I was happy that my loose hinges are going to get fixed but now I haven't seen my laptop from 2 days n he said I had graphics problem n m certainly not feeling well n also tensed can someone please answer me just 3 questions 

1. Can the worker replace the old 1050m with new one??  Is it possible 

2.can I purchase warranty after this laptop surgery 

3.ia my laptop going to work well after this??