Start in full screen, look at each solid color and click any spot that looks stuck or dead. Afterwards answer one question about light around the edges of a black screen.
Everything is measured inside this page. The measured values and results are not sent, saved or recorded.
Measure
The color test runs here. Press Start in full screen.
Without a mouse: move the cross with the arrow buttons, then press Mark here on a spot that looks stuck or dead.
Estimated refresh rate
–
Check what you marked
No pixels marked. If you saw nothing unusual, continue to the result.
Result
Criteria used
These are the criteria this test applies. The values and the basis come from the same table the test judges with.
Item
Criterion
Value
Basis
Marked pixels
Marked pixels that call for a check JikCheck initial criterion
1
Internal criterion: if the user marked any pixel, the result is Check needed. The number of pixels allowed differs by manufacturer and product policy, so Outside criteria is not given and checking the policy is suggested.
Backlight bleed seen
Backlight bleed seen JikCheck initial criterion
1
Internal criterion: if the user answers that backlight bleed was “seen” on a black screen, the result is Check needed. Advice to tell it apart from brightness, viewing angle and IPS glow comes with it. Without an answer the result is Cannot judge.
How to use and FAQ
?How do I use the monitor test?
Press Start in full screen. Look at each color, click any spot that looks stuck or dead, and use Next color to go through all of them. Press Finish, answer the question about light at the edges, and choose Show result.
?What counts as a stuck pixel?
A point that stays one color while the screen shows other colors. Makers accept different numbers of them, so the result only says whether you marked any.
?Is light around the edges always a problem?
No. Many panels show some light at the edges of a black screen, especially at high brightness or from an angle. It is only flagged for a closer look.
?Is the result proof for an exchange or warranty claim?
No. The result is a reference measurement based on what you saw and on signals your browser receives. Follow the seller’s or manufacturer’s rules for exchange and repair.
Within criteria
Check needed
Outside criteria
Cannot judge
Measured
Your report
{value}
{value} ms
{value} key(s)
{value} %
{value} Hz
{value} dBFS
{value} px
{value} fps
{value} point(s)
Start
Stop measuring
Show result
Measure again
Copy result summary
Ready. Press Start.
Measuring…
Measurement stopped.
Result
Result: {level}
Overall: {level}
Measured values
Criteria compared
If met: {level}
Reference values (not part of the judgement)
What to check next
Cannot be measured in this browser
Not applicable
JikCheck initial criterion
Copying…
Copied
Could not copy. Select the text below and copy it yourself.
Result summary (select and copy)
{name}: {current} / {needed}
{name}: {current} (enough for a judgement)
There is enough data for a judgement. You can press Show result.
You can press Show result before it is enough; items that lack data show “Cannot judge”.
JikCheck - {test}
Date: {date}
Browser: {browser}
Overall: {level}
{title}: {level} ({evidence})
Reference measurement from the browser. It does not confirm whether a device is faulty or why.
Unknown browser
Could not start the measurement. Press Start to try again.
Monitor test
Marked pixels
Spots you marked as stuck or dead on the screen. This is your own report, and the number of pixels makers allow differs.
Backlight bleed seen
Your answer on whether light showed around the edges of a black screen. Brightness and viewing angle affect this.
Pixels marked
Backlight bleed answer (1 = seen, 0 = not seen)
Estimated refresh rate
Frame interval spread
Marked pixels that call for a check
Backlight bleed seen
Wipe the screen with a soft dry cloth and look again; dust can look like a stuck pixel.
Light around the edges of a black screen depends on brightness, viewing angle and panel type. Lower the brightness and look straight at the screen.
Check the maker’s pixel policy: how many stuck pixels it accepts and how long the exchange period is.
If it still happens, check the seller’s or manufacturer’s exchange and warranty terms.
Start in full screen
Full screen was not available, so the test continues inside this window. Make the window as large as you can.
{color} screen ({n} of {total})
Pixels marked: {count}
{n}. {color} screen, {x} % across, {y} % down
Remove
White
Black
Red
Green
Blue
Cross: {x} % across, {y} % down
Pixel {n} marked: {x} % across, {y} % down.