How to test Kindle Colorsoft for dead pixels
Navigate to this page on your Colorsoft's Silk browser to run the colour test tool. The Kaleido 3 display uses a monochrome E-Ink base layer with a colour filter array (CFA) on top — dead pixels can occur in either layer.
Test on a white background first (dark dead pixels in the E-Ink layer), then switch to solid red, green, and blue individually. A dead pixel in the colour filter may only be visible on certain colours. Allow 2–3 seconds for the E-Ink layer to fully refresh between each colour.
What a dead pixel looks like on Kindle Colorsoft
Dead pixels on the Colorsoft can take three forms: a dark dot (failed E-Ink microcapsule), a discoloured pixel (stuck colour filter), or a cluster of wrong-colour pixels in one sub-cell of the colour array.
Because the colour layer resolution is 150 ppi (versus 300 ppi for black and white), a colour filter defect appears slightly larger than a standard E-Ink dead pixel — roughly 0.17mm versus 0.085mm. This makes colour-layer defects more visible during reading.
Amazon dead pixel warranty — what's covered
Amazon's 1-year Limited Warranty covers Colorsoft display manufacturing defects. Given the Colorsoft's dual-layer display technology, document the defect clearly: photograph it in both colour mode (good lighting) and black-and-white mode. Note whether the defect changes between the two modes.
Contact Amazon device support at amazon.com/devicesupport. Amazon typically replaces the device for a single visible manufacturing defect.
How to fix a dead pixel on Kindle Colorsoft
E-Ink dead pixels in the base layer cannot be fixed by software. However, if the defect is a stuck colour sub-pixel in the colour filter layer, the stuck pixel fix tool is worth running for 10–15 minutes — colour filter defects may respond to cycling in a way that base E-Ink pixels do not. If the defect persists, contact Amazon warranty support.