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Test Camera Hien Thi Man Hinh Den: 4 Cach Khac Phuc That Su Hieu Qua

Da xem lai lan cuoi 2026-05-15. Neu test camera tren trinh duyet mo nhung ban xem truoc la mot hinh chu nhat den, camera hiem khi bi hong - mot trong bon nguyen nhan ben duoi co kha nang xay ra cao hon nhieu. Di qua danh sach tu tren xuong; moi cach khac phuc mat duoi mot phut.

Cau tra loi 30 giay. Ban xem truoc den tren test camera trinh duyet hau nhu luon co nghia la thiet bi dang duoc su dung, bi chan hoac dong nap che - khong bi loi. Buoc 1: cap lai quyen tai bieu tuong khoa tren thanh dia chi. Buoc 2: xac nhan camera duoc bat o cap he dieu hanh (Quyen rieng tu va Bao mat tren macOS / Windows). Buoc 3: dong moi ung dung camera ao (OBS, Snap Camera, nen ao Zoom) dang giu thiet bi. Buoc 4: kiem tra nap che rieng tu vat ly hoac cong tac BIOS tren laptop. Hau het cac bao cao "camera den" duoc giai quyet trong buoc 1 hoac buoc 3.

Mot dau hieu nhanh truoc khi ban bat dau: theo doi den LED chi bao cua camera (hoac nap che vat ly). Neu ban xem truoc den va den LED khong bao gio sang, ban co kha nang dang xu ly nap che hoac cong tac firmware (Cach 4). Neu den LED sang nhung ban xem truoc van den, mot quy trinh khac thuong dang giu luong (Cach 3). Quan sat duy nhat nay giup ban chon nhanh chong nhat truoc tien.

Cach 1 - Quyen camera bi loi thoi hoac bi tu choi trong trinh duyet

Trinh duyet la lop gan nhat voi trang test camera, va quyen camera tren co so nguon cua no la nguyen nhan pho bien nhat cua ban xem truoc den. Khoa thanh dia chi co the hien thi trang nhu "duoc phep" trong khi trinh duyet van dang ton trong ban ghi quyen loi thoi tu mot mang khac, dong bo ho so hoac phien an danh truoc do - luong camera khong bao gio mo va canvas xem truoc van trong. Mau cap quyen loi thoi nay cu the cho quyen webcam; mot trang test microphone se the hien nguyen nhan goc tuong tu nhu mot dang song phang tren do do dau vao mic thay vi mot o video den.

Chrome / Edge: nhap vao bieu tuong khoa (hoac "Thong tin trang") tren thanh dia chi → Camera → chon Cho phep, sau do tai lai trang. Neu menu tha xuong hien thi Camera: Chan, chuyen sang Cho phep va tai lai.

Safari (macOS): menu Safari → Cai dat cho trang web nay → Camera: Cho phep. Safari khong dua yeu cau qua thanh dia chi, vi vay thay doi qua menu la con duong duy nhat.

Firefox: nhap vao bieu tuong khoa → Ket noi bao mat → Them thong tin → Quyen → xoa "Su dung Camera". Tai lai trang de Firefox hoi lai.

Neu bieu tuong thanh dia chi cho thay camera duoc phep va ban xem truoc van den, quyen camera on; chuyen sang Cach 2.

Cach 2 - He dieu hanh chan camera

Cac he dieu hanh hien dai duy tri mot cong tac chinh ghi de moi quyen trinh duyet. macOS gioi thieu dieu nay trong Mojave; Windows 10 them no trong 1903. Mot ban xem truoc den voi quyen trinh duyet da duoc dat thanh "Cho phep" hau nhu luon co nghia la cong tac he dieu hanh dang tat.

macOS: Cai dat he thong → Quyen rieng tu va Bao mat → Camera. Trinh duyet cua ban phai duoc bat. Neu khong co trong danh sach, mo test camera mot lan va macOS se them muc do.

Windows 11 / 10: Cai dat → Quyen rieng tu va bao mat → Camera. Bat ca Cho phep ung dung truy cap camera cua ban va Cho phep ung dung may tinh truy cap camera cua ban. Ca hai co phai duoc bat - co thu hai bao gom Chrome, Edge va Firefox tren Windows.

iOS / iPadOS: Cai dat → Safari → Camera → chon Hoi hoac Cho phep. iOS giu quyen camera theo trang; xoa du lieu trang dat lai.

Android (Chrome): Cai dat → Ung dung → Chrome → Quyen → Camera → Chi cho phep khi su dung ung dung. Cai dat Android ghi de Cho phep trong trinh duyet khi cong tac cap ung dung tat.

Cach 3 - Mot ung dung khac dang giu camera

Webcam phoi bay mot luong phan cung duy nhat. Quy trinh dau tien mo no co quyen truy cap doc quyen; moi yeu cau sau do nhan ban xem truoc den vi thiet bi "ban" nhung khong "bi chan". Cac ung dung camera ao va khach hang hop la nhung thu pham pho bien nhat.

Thoat / dung nguoi giu: dong OBS Studio, Snap Camera, ManyCam, NVIDIA Broadcast, Loopback va bat ky ung dung hop nao (Zoom, Teams, Google Meet, Webex) co the da de mot luong nen lai. Tren macOS, mot Force Quit cua ung dung giai phong luong trong vong hai giay; tren Windows, ket thuc quy trinh trong Task Manager lam dieu tuong tu.

Xac nhan giai phong: den LED chi bao cua camera tren hau het cac laptop tat di vao thoi diem quy trinh giu giai phong thiet bi. Neu den LED van sang sau khi moi khach hang hop dong, trinh dieu khien camera ao van duoc tai - khoi dong lai de xoa hoan toan.

Kiem tra lai: tai lai https://freetoolonline.com/device-test-tools/camera-test.html. Ban xem truoc se xuat hien trong vong mot giay tu khi trang cap quyen.

Cach 4 - Nap che rieng tu hoac cong tac BIOS

Lop cuoi cung la phan cung. Nhieu laptop kinh doanh (ThinkPad, Latitude, EliteBook, MacBook trong mot so cau hinh) di kem voi nap che rieng tu vat ly che phu vat ly ong kinh; mot so cung dua ra mot cong tac webcam cap BIOS song sot sau cai dat lai he dieu hanh.

Nap che rieng tu: tim mot thanh truot nho tren khung ong kinh phia tren man hinh. Vi tri dong che phu ong kinh bang mot lop phu mau; truot no sang trai hoac phai cho thay ong kinh. Mot ban xem truoc den khong co hoat dong LED la trieu chung cua nap che dong.

Cong tac BIOS / firmware: tren cac laptop kinh doanh Lenovo va Dell, camera co the bi vo hieu hoa trong BIOS. Khoi dong lai, vao thiet lap (F1, F2 hoac F12 tren hau het cac mo hinh), tim Thiet bi → Webcam hoac Bao mat → Truy cap cong I/O → Webcam, va xac nhan no duoc dat thanh Enabled.

Cong tac phan cung: mot so laptop cu hon (HP EliteBook 840 G5 / G6, Lenovo X1 Carbon Gen 6) co mot phim tat phim chuc nang (Fn + F9 hoac tuong tu) chuyen doi webcam o cap firmware. Nhan no va kiem tra lai.

Van den sau ca bon? - quy trinh chan doan

  1. Thu mot trang thu hai. Mo webcamtests.com trong cung phien trinh duyet. Neu trang do cung hien thi den, nguyen nhan van o phia tren trang (trinh duyet / he dieu hanh / ung dung / phan cung).
  2. Thu mot trinh duyet thu hai. Neu Chrome hien thi den nhung Safari hien thi ban xem truoc, nguyen nhan o cap trinh duyet (tien ich mo rong, ho so hoac quyen loi thoi). Dat lai cai dat trang Chrome hoac su dung ho so khach.
  3. Thu mot tai khoan nguoi dung thu hai. Chuyen sang nguoi dung he dieu hanh moi tao va mo test camera. Neu no hoat dong o do, nguyen nhan o ho so nguoi dung cua ban (mot muc quyen, mot tien ich mo rong trinh duyet hoac mot trinh dieu khien camera ao duoc dang ky cho nguoi dung cua ban).
  4. Thu mot may thu hai. Neu mot dien thoai hoac may tinh bang hien thi test camera hoat dong ngay lap tuc, may that bai co van de phan cung hoac trinh dieu khien. Mo Device Manager (Windows) hoac System Information (macOS) va tim camera trong Imaging Devices.

Van den sau ca bon? Leo thang theo thu tu nay: thu mot trang thu hai (webcamtests.com), mot trinh duyet thu hai, mot tai khoan nguoi dung thu hai va cuoi cung mot may thu hai. Mau that bai do la cach nhanh nhat de noi xem nguyen nhan o cap trinh duyet (tien ich/ho so), cap ho so (cai dat nguoi dung he dieu hanh) hay cap phan cung (trinh dieu khien/webcam).

Cho ban xem truoc camera den cu the, bon buoc lam viec ra ngoai tu lop quyen trinh duyet den nap che phan cung - hau het cac truong hop duoc giai quyet trong buoc 1 hoac 3 vi quyen trinh duyet loi thoi va nguoi giu camera ao (OBS, Snap, trinh dieu khien nen Zoom) chiem phan lon cac bao cao xem truoc den. Neu cac buoc 1-4 deu tra ve sach se va den LED chi bao cua camera van khong sang khi trang test tai, ong kinh da bi loi thay vi bi chan va mot bai kiem tra hoan doi webcam USB hoac yeu cau bao hanh la dong thai tiep theo.

Cac van de tuong duong den tren test microphone thi sao?

Cung mo hinh bon lop ap dung cho test microphone: quyen trinh duyet, tat tieng cap he dieu hanh (Quyen rieng tu va Bao mat → Microphone), mot ung dung khac giu thiet bi, cong tac tat tieng phan cung. Neu mot cuoc goi video that bai hoan toan, chay ca test camera va test microphone trong cung phien trinh duyet - neu ca hai tra ve hoat dong, ban than khach hang cuoc goi la nguyen nhan; neu chi mot that bai, bai test tra ve bi vo xac dinh lop.

Cac cau hoi thuong gap

Tai sao den LED chi bao cua camera van tat khi ban xem truoc den?

Den LED duoc noi voi duong dien cua camera, khong phai luong du lieu cua no. Neu den LED toi, camera khong duoc cap dien - dieu do co nghia la nap che phan cung hoac cong tac BIOS (Cach 4), khong phai van de quyen hoac ung dung.

VPN co gay ra test camera den khong?

Khong. VPN dinh tuyen cac goi IP, khong phai luong camera. Mot ban xem truoc den trong khi VPN dang bat la mot trung hop; kiem tra Cach 1 / Cach 3 thay vi the.

Tai sao camera hoat dong trong Zoom nhung khong trong test trinh duyet?

Zoom la nguoi giu. Dong Zoom (Cach 3) va kiem tra lai. Trinh duyet khong the lay duoc thiet bi trong khi Zoom co luong doc quyen mo - ngay ca khi Zoom o nen, thiet bi van ban.

Toi thay den LED chi bao cua camera xanh nhung ban xem truoc van den.
Camera duoc cap dien va mot quy trinh da mo luong, nhung canvas xem truoc khong dang ve. Tai lai trang (Cmd+R / Ctrl+R) de buoc dinh kem luong moi. Neu den LED xanh va ban xem truoc van khong ve, mot tien ich mo rong trinh duyet co kha nang dang chan canvas - thu mot ho so trinh duyet khach.

Lien quan

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. Your file is processed in your browser and never uploaded. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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