IMPORTANT:we will check every single pc before despatch, and packed with bubble wrap paper, we are not responsbile for damages when shipping on the way. we did accept exchange requirements previously but after we meetup with the customers, we found out nothing wrong with the pcs they complained,the problem they decribed cant even be found by other customers. Fussy customer pls reconsider, as we will not entertain. Its really time costly for nothing& we lack of manpowers, thks very much for ur understanding.