求翻译：我上周买了一台电脑，有时不能启动并且运行时噪音很大，你给该公司客户服务部写一封投诉信，说明自己试过对方建议的每种解决方法，但不起作用，我要求换货。是什么意思？

Last week I bought a computer, sometimes cannot be started and noisy when transportation lines, you write a complaint letter to the company's customer service department, explains himself tried the other suggestions of each solution, but does not work, I request a replacement.