hmm...this is a tough case cause you knew about the keypad problem before buying the HP. He did told you about the problem but quoting it as "1%" is rather subjective. Also, no such things as fixing a HP cost only RM10. Even update firmware also cost more I think. You shouldn't have accepted the phone knowing that it has problems unless you are very sure you can fix it at certain price.

Eventhough it is under PW, but you already negotiated with the seller about this "1%" problem. Money has been deducted as well. It's your fault that you thought that this problem can be solved with RM10.

This is really a hard case to settle because both party also have their reasons. I think it's best that both party discuss this over and try to compromise a solution. This is because PW and terms & conditions was not discussed properly.

One question that this raise up is, does PW includes defects due to another defects that has been settled?

Example here would be, minor keypad problem which already been negotiated by both party and agreed to deduct RM10. Later, withing PW period, the defect got worse up to unbearable condition. Is this worse condition covered under PW?

This is yes and no. Really hard to decide. You need human intepretation to decide depending on circumstances.

NO when HDD got 1 bad sector then later 10 bad sectors crops up. Cause it is common that when 1 bad sector occur, a lot will follow.

For eg, YES when screen have 1 dead pixel. Later, 5 more dead pixels came up.

Yet, this is still very debatable. Because the dead pixel could be due to problems on display chip or the board which if someone knowledgable knows will say no warranty or something.

So, it really comes down to having good faith with the deal.

I don't agree with you on this. The seller already told the buyer about this problem and the buyer AGREED to take the item with RM10 as the deduction for repair. Buyer's lack of knowledge in repair fee is not the seller's problem. Seller also banked on this lack of knowledge sold it to him (intentionally or unintentionally). As a seller, he also want to sell his product. He might not be 100% honest here but hey..find me one seller in lowyat plaza that is 100% honest.

Moreover, we are talking about 2nd hand products here. Don't compare it with buying new products. It's totally different.

End of the day, both side is at fault.