This printed will should be invalid. In the absence of other sufficient evidence, computer-printed wills in Zhang Xia are not protected by law.
Article 17 of the Inheritance Law stipulates: "A self-written will is written by the testator, signed and marked with the year, month and day." Judging from your letter, Lin Jie's will should have been written by himself. As long as the will is signed by Lin Jie and the specific time is indicated, it has legal effect. And Zhang Xia's computer-printed will, we can think of it as similar to the will of writing a book. According to the third paragraph of Article 17 of the Inheritance Law: "When an agent writes a will, it shall be witnessed by more than two witnesses, and one of them shall write the book on his behalf, indicating the year, month and day, and shall be signed by the agent, other witnesses and the testator". However, Zhang Xia's computer-printed will lacks the autographs of computer typists, other witnesses and testators, which does not meet the statutory form requirements of the will, so it should be invalid. However, if Lin Jie still holds the manuscript written by his mother, and has her signature, and indicates the year, month and day, she can use the contents of this self-written will to divide her inheritance.