One standard for every Lenovo monitor
Lenovo publishes a single pixel standard for its consumer and commercial monitors and its All-in-One desktops, and the table repeats the same numbers for every size and resolution it lists, from a 13.3-inch 1600 × 900 panel to a 43.4-inch curved one: no pixel defects, at most 2 bright sub-pixels and 5 dark ones, and no more than 5 of both together. Lenovo says this goes beyond ISO 9241 Class 1 and Class 2, which tolerate one or two whole pixels of each kind, because it permits neither whole-pixel nor adjacent sub-pixel defects.
The exception is the ThinkVision P and T series Gen-40, where Lenovo’s note says to contact it about a single bright pixel during the warranty period. Lenovo’s own definitions call a pixel bright only when all three of its sub-pixels are lit, and those are ruled out on every line already, so the note probably reaches further, but it doesn’t say so. Choose that line under Your Lenovo display and a single bright sub-pixel shows as possibly outside the standard.
What counts as adjacent
A pixel is three sub-pixels side by side, so two faulty neighbors usually blend into one dot of a mixed color: yellow, cyan or magenta on the black screen when two are stuck on, red, green or blue on the white screen when two are stuck off. Mark such a dot as 2 bright sub-pixels or 2 dark sub-pixels; since Lenovo allows none of them, the check puts even one outside the standard. A pure red, green or blue dot on black, or a cyan, magenta or yellow dot on white, is a single sub-pixel and counts toward the 2 bright and 5 dark. Whole pixels, a white dot on black or a black dot on white, are outside the standard from the first one.
Laptops and tablets use a different table
The standard above covers monitors and All-in-Ones only. For IdeaPad, Lenovo-brand and ThinkBook laptops and tablets, Lenovo’s table depends on resolution: at 1920 × 1080 it allows up to 2 bright sub-pixels but no bright green one, up to 10 dark sub-pixels and 12 in all, and bright dots must be at least 15 mm apart. The check here doesn’t model those rules, so on a Lenovo laptop run the dead pixel test and compare its report with that table by hand.
Contacting Lenovo
Lenovo’s instruction is to contact Lenovo or your service provider when the count exceeds its table during the warranty period. Type the serial number from the label into the notes before you download the report, which records the Lenovo line you checked against and every dot’s type and position. The same test works for other brands with their own rules: Dell, HP and ASUS.
Lenovo’s limits at a glance
The most defects each Lenovo 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. Lenovo allows no whole pixels stuck on or off and no dots of two adjacent sub-pixels on any line, so a single one is outside the policy too. Source: Lenovo HT002800 pixel policy (April 2026), checked September 2026.
| Display | Bright sub-pixels | Dark sub-pixels | Both together | Whole pixels | Adjacent pairs |
|---|---|---|---|---|---|
| Lenovo or ThinkVision monitor, or Lenovo All-in-One desktop | 2 | 5 | 5 | 0 | 0 |
| ThinkVision P or T series Gen-40 monitor | 0 or 2* | 5 | 5 | 0 | 0 |
* ThinkVision P or T series Gen-40 monitor: Lenovo’s Gen-40 note says to contact it about 1 bright pixel, but Lenovo defines a bright pixel as all three sub-pixels lit, so the note may not cover a single bright sub-pixel. The check calls a count between the two numbers possibly over.