https://h30471.www3.hp.com/t5/fan-ti-zhong-wen-zhuan-qu/bao-gu-qi-wu-fa-bian-geng/m-p/920826#M5067 Manufactured date cannot change. Keep your invoice, receipt, delivery note or any prove of purchase.<BR /><BR />Upgrade care pack contract or extend warranty could help update warranty start date, base on prove of purchase you had. Mon, 22 Apr 2019 07:45:03 GMT y2kim 2019-04-22T07:45:03Z https://h30471.www3.hp.com/t5/fan-ti-zhong-wen-zhuan-qu/bao-gu-qi-wu-fa-bian-geng/m-p/920615#M5063 <P>保固期無法變更</P> Fri, 19 Apr 2019 09:10:38 GMT https://h30471.www3.hp.com/t5/fan-ti-zhong-wen-zhuan-qu/bao-gu-qi-wu-fa-bian-geng/m-p/920615#M5063 AAAABBBB 2019-04-19T09:10:38Z https://h30471.www3.hp.com/t5/fan-ti-zhong-wen-zhuan-qu/bao-gu-qi-wu-fa-bian-geng/m-p/920826#M5067 Manufactured date cannot change. Keep your invoice, receipt, delivery note or any prove of purchase.<BR /><BR />Upgrade care pack contract or extend warranty could help update warranty start date, base on prove of purchase you had. Mon, 22 Apr 2019 07:45:03 GMT https://h30471.www3.hp.com/t5/fan-ti-zhong-wen-zhuan-qu/bao-gu-qi-wu-fa-bian-geng/m-p/920826#M5067 y2kim 2019-04-22T07:45:03Z