Cach kiem tra man hinh laptop de tim diem chet va ho sang

Kiem tra man hinh laptop chay trong trinh duyet: chon mot trong sau o mau dac (do, luc, lam, den, trang, vang) va man hinh se hien thi day du de cac loi lo ra ro. Khong tai len gi va khong can tai khoan. Phat hien diem anh ket sai mau, bui hoac vet toi gan vien man hinh.

Last reviewed: 2026-07-01

Duoc kiem duyet boi doi ngu bien tap FreetoolOnline

Thuoc tinhGia tri
Dinh dangTruc tuyen, khong cai dat, khong dang ky
Chi phiMien phi
Cong cu su dunghttps://freetoolonline.com/device-test-tools/lcd-test.html

Hay kiem tra tung mau mot de moi loai loi lo ra tren o mau lam no hien ro. O mau den lo ra cac diem anh ket sang khong bao gio tat; o mau trang lo ra cac diem chet toi va bui tren be mat; cac o mau do, luc va lam moi cai co lap loi diem phu tren kenh mau do; con mau vang gay ap luc len ca diem phu do va luc cung luc. O mau den con giup phan biet ho sang that su voi mot dai chuyen mau do goc nhin. Ho sang that hien ra nhu mot lop suong xam am mo dan vao trong tu vien man hinh va giu nguyen khi tam nen vuong goc voi mat ban, trong khi sac mau do goc nhin se dich chuyen hoac bien mat khi ban nghieng nap may. Mot goc man hinh van lanh mau hon khi ban nhin thang dang de ban trao doi ve bao hanh.

← Quay lai cong cu tien ich

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

Why trust these tools

  • Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
  • No install, no sign-up. Open a tool and get a working output in seconds - nothing to download and no account to create. Tools that need heavy processing run it on our service, so even a low-powered machine gets the job done.
  • Analytics stops at the page view. We measure which pages get visited, not what you type or upload inside a tool. There is nothing to sign in to and no profile is attached to your input.
  • Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
  • Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.

Related tools:

Tags: #utility

Related guides: