Hi gohkhm,
They did replace the antenna once. I forgotten to include that in the draft. I mentioned to them that I suspect that it might be due to the motherboard. However, the questioned me how come I say that the problem might be due to the motherboard. I told them that since we have tried all the solutions and the only last resort is to replace the motherboard. But they refused to replace it. IBM does not have anymore set for a one-to-one replacement. The team leader even told me that they don't provide replacement set for laptop that are around 3 yr old according to their replacement guidelines. I asked her to email me their replacement guidelines. This was the reply that I got: "As spoken earlier, you have requested for the replacement guidelines for Lenovo. We are sorry, this is not possible as the Policy is strictly for internal use, and it is not to be shared with the public, even sentences of it. "
In the warranty entitlement, it states that IBM or your reseller, if approved by IBM to provide warranty service, will either, at its discretion, 1) repair it to make it function as warranted, or 2) replace it with one that is at least functionally equivalent. If IBM is unable to do either, you may return the Machine to your place of purchase and your money will be refunded.
Hence, IBM has the right to keep on trying to repair your laptop until you give up hope. Thats was what they did to me from March 2010 to September 2010 (6 months). Do take note that they may give you a used/old laptop. This was what CASE (Customer Association of Singapore) told me. Hence, I went to pursue for refund. The warranty entitlement was well crafted to their favor.