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Huong dan kiem tra diem anh chet - tim, xac nhan va phuc hoi diem anh

Mot cham sang tren man hinh den hoac mot cham den tren man hinh trang de bi bo qua trong cong viec hang ngay va khong the phot lo mot khi ban da thay no. Huong dan nay di qua ba loai loi diem anh, cach nhanh nhat de phat hien tung loai, loai nao co the phuc hoi, va khi nao nen leo thang sang thay the bao hanh. Cung phuong phap kiem tra nay hoat dong tren laptop, man hinh ngoai, dien thoai va TV.


Diem anh chet, ket va nong: moi loai thuc su la gi

Diem anh hien dai duoc tao tu ba diem anh con - mot do, mot xanh la, mot xanh duong - va mau ban thay tren man hinh la anh sang ket hop ma chung phat ra. Moi diem anh con duoc dieu khien doc lap boi mot transistor nho. Khi mot trong cac transistor do hoac diem anh con cua no hong, ket qua la mot trong ba loi nhin thay:

  • Diem anh chet. Transistor bi hong hoac dut ket noi va khong the lay dien. Diem anh vinh vien den tren moi mau va mau. Diem anh chet nhin thay tren nen trang va nen sang.
  • Diem anh ket. Mot hoac nhieu diem anh con bi khoa o cong suat day. Diem anh hien thi mot mau duy nhat (do, xanh la, xanh duong sang, hoac ket hop nhu vang/luc lam/do tuoi) bat ke phan con lai cua man hinh dang hien thi gi. Nhin thay tren nen den, thuong co the phuc hoi.
  • Diem anh nong. Mot diem anh ket cu the o trang thai "trang day du" - ca ba diem anh con bat day du. Xuat hien nhu mot cham trang sang tren nen den hoac toi.

Ba loai thuong bi nham lan vi trong giong nhau o khoang cach thu nho, nhung duong khoi phuc rat khac: diem anh ket thuong co the duoc do lai bang cach lap transistor; diem anh chet thi khong. Xac dinh loai ban co la buoc mot.


Cach kiem tra: quet mau toan man hinh

Kiem tra nhanh nhat la phu kin man hinh bang mot mau dac va tim diem anh nao khong khop. Chay quet qua it nhat bon mau:

  1. Den thuan (#000000). Lo ra diem anh ket (chung hien la cac cham co mau) va diem anh nong (cham trang).
  2. Trang thuan (#FFFFFF). Lo ra diem anh chet (cham den) va bat ky diem anh con nao ket o trang thai tat.
  3. Do thuan (#FF0000). Lo ra diem anh con xanh la hoac xanh duong bi ket o cong suat day (chung se xuat hien nhu cham vang hoac do tuoi).
  4. Xanh la thuan (#00FF00). Lo ra diem anh con do hoac xanh duong bi ket bat (cham vang hoac luc lam).
  5. Xanh duong thuan (#0000FF). Lo ra diem anh con do hoac xanh la bi ket bat (cham do tuoi hoac luc lam).

Dung cong cu LCD Test cho viec nay; no lap qua quet mau o che do toan man hinh khong co chrome trinh duyet. Ngoi o khoang cach quan sat binh thuong (50-70 cm cho man hinh ban, 30-40 cm cho laptop) thay vi ap mui vao tam nen - mot diem anh lac loi chi la loi neu nhin thay o khoang cach dung binh thuong.


Cach phuc hoi diem anh ket

Lap bang phan mem (5-20 phut, thuong hoat dong). Chay hoat anh lap mau nhanh phu do, xanh la, xanh duong, va trang o 60 Hz trong 15 phut voi diem anh trong vung bi anh huong. Cac chuyen doi nhanh co the "go ket" transistor. Nhieu tien ich mien phi ton tai (JScreenFix, UDPixel); cac mau kiem tra LCD o tren cung co the duoc lap thu cong.

Phuong phap an nhe (giai phap cuoi, dung can than). Voi man hinh bat va dang hien thi den, che diem anh ket bang vai soi nho va an rat nhe bang dau ngon tay trong 5-10 giay trong khi tat va bat lai man hinh. Viec nay co the dat lai mot transistor bi ket nhung co nguy co tao them loi neu lam qua manh. Khong an truc tiep vao man hinh OLED hoac AMOLED - ap luc co the lam hong cac lop huu co vinh vien.

Dieu khong hieu qua. Diem anh chet khong the phuc hoi bang bat ky ky thuat phan mem, nhiet hoac ap luc nao. Neu diem anh hien den tren trang VA khong doi mau tren bat ky nen nao khac, no da chet va chi thay tam nen moi sua duoc.


Bao hanh: khi nao tra man hinh hoac laptop

Chinh sach nha san xuat khac nhau. Ba nguong pho bien cho viec thay the mien phi:

  • Khong khoan nhuong nghiem ngat (man hinh cao cap cua Apple, mot so tam Dell Premium): bat ky diem anh chet hoac ket don le nao deu la co so de thay the.
  • ISO 9241-307 Lop II (hau het man hinh va laptop tam trung): toi da 2 chet, 2 sang vinh vien, hoac 5 loi diem anh con tren mot trieu diem anh truoc khi bao hanh ap dung.
  • ISO 9241-307 Lop III (tam nen gia re): toi da 5 chet, 5 sang vinh vien truoc khi bao hanh ap dung.

Kiem tra phieu thong so ky thuat cua mau cu the cua ban truoc khi lien he ho tro. Chup anh loi o khoang cach quan sat binh thuong (dien thoai tren gia ba chan, cung anh sang phong nhu cau hinh thuong ngay cua ban) - mot buc anh duoc dong khung tot lam tang toc dang ke quy trinh RMA. Luu cac buoc tai tao loi (mau nao lo ra, ban da quan sat no bao lau) de dua vao phieu ho tro.


Kiem tra man hinh moi truoc khi cua so tra lai dong

Cach nhanh nhat de bat duoc loi khi ban van con thoi gian tra lai la kiem tra mo hop dau tien 15 phut:

  1. Ket noi man hinh; dat do phan giai goc va 60 Hz.
  2. Chay quet mau LCD Test trong 60 giay moi mau o khoang cach canh tay.
  3. Kiem tra cac goc va trung tam bang den pin giu o 45° lech truc cho hien tuong ri sang den nen.
  4. Chay kiem tra camera va kiem tra microphone neu man hinh co webcam hoac loa tich hop.
  5. Chup anh man hinh cua bat ky loi nao voi kich thuoc va khoang cach duoc ghi chu.

Hau het cua so tra lai la 14-30 ngay. Chay kiem tra nay ngay dau tien ton muoi lam phut va giup ban khong phat hien loi sau hai thang khi ban da ket voi no.


Cong cu va kiem tra lien quan

  • LCD Test - quet mau toan man hinh cong voi den nen va doc do phan giai.
  • Camera Test - xac minh webcam tich hop hoac ben ngoai truoc cuoc goi.
  • Microphone Test - muc dau vao, tan so lay mau va kiem tra quyen.
  • Keyboard Test - moi phim dang ky chinh xac, khong phim chet.
  • Kiem tra OLED vs kiem tra LCD: dieu gi thay doi tren OLED - huong dan giai thich cac kiem tra nao tu quet diem anh chet nay van ap dung khi man hinh la OLED thay vi LCD (diem anh chet va ket van doc nhu cu; ri sang den nen khong the xay ra; luu hinh va burn-in la cac dac trung rieng OLED can them vao).


← Quay lai Cong cu Kiem tra Thiet bi

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