Dell Dead Pixel Test and Pixel Policy Check

Pick your Dell line first

Dell’s limits depend on the product line, so choose yours under Your Dell display before you read the result. The series is part of the model name: UltraSharp models start with U or UP and Alienware with AW, for example. A laptop is sorted by its screen resolution instead: 1600 × 900 or more gets the stricter limit of zero bright pixels. Two lines aren’t in the list. Large-format monitors of 43 inches and up get a range of 12 to 15 dark sub-pixels depending on the model, and Dell names the P1424H and P1425 as Dell Pro P models without Premium Panel Exchange; for those, ask Dell which numbers apply.

How the check reads Dell’s tables

Every mark starts as Not sure yet, and the check gives no result until you’ve chosen a type for each one from the key beside it. Dell counts bright pixels and bright sub-pixels together, so a white dot on black counts as one defect, just like a lone red, green or blue sub-pixel. On the Premium Panel Exchange lines the allowance is zero, so the first dot you set as bright puts the display outside the guidelines. For dark defects the tables name only sub-pixels and don’t say whether a black dot, where a whole pixel is off, counts once or three times. When that choice would change the answer, the check shows the count as a range and says possibly over instead of guessing either way. Dell’s page also contradicts itself on the Alienware AW5520QF: its Premium Panel Exchange list leaves the model out, yet its table allows it zero bright pixels. The check uses the stricter zero, so ask Dell which rule it applies. The AW2526HL and AW2726DL have the opposite problem: the same list covers them, which would mean zero bright pixels, but the table of standard monitors allows them 2. On that line the check shows the limit as 0 or 2 and calls one or two bright dots possibly over.

Dell also leaves out partial sub-pixels: specks smaller than about half a sub-pixel, which it calls a normal part of LCD manufacturing. Count only dots you can see without a magnifier from a normal distance, which Dell puts at 35 to 50 cm, or 100 to 150 cm for a 43-inch or larger monitor.

Confirm it with Dell’s built-in test

Dell monitors can draw their own test screens. Unplug the video cable and switch the monitor on: it shows a floating box on black, which already works as a bright-dot check. The built-in diagnostics then cycle through red, green, blue, white and black; how you start them varies by model, so look in the monitor’s manual. A dot that appears there too, with no computer attached, is in the panel rather than the cable or graphics card. On a Dell laptop, restart, tap F12 at the Dell logo and choose Diagnostics for the same color cycle.

Before you contact Dell

Dell’s guidelines say a stuck pixel won’t fade on its own and a dead one can’t be repaired, and Dell recommends against fixer tools, so on a covered display go straight to support. Look up your warranty with the Service Tag, then download the report above: it names the line you picked, Dell’s limits, and each dot’s type and position. Other brands count differently: see the HP check, the Lenovo check and the ASUS check, or use the dead pixel test for a screen of any brand.

Dell’s limits at a glance

The most defects each Dell product line may have during its warranty and still count as working, as the policy check above uses them. One more than the number shown is outside the policy. Source: Dell Display Pixel Guidelines (updated July 2026), checked September 2026.

* Alienware AW2526HL or AW2726DL: Dell’s coverage list puts every Alienware monitor except the AW5520QF under Premium Panel Exchange, which allows no bright pixels, but its table allows these two models 2. The check calls a count between the two numbers possibly over.