Dead pixel on a brand new laptop, will the store replace it?

Take photos now: full screen white, black, red, green and blue, phone held steady, with something in frame that shows the date. Then contact the seller in writing today, not next month.

Whether one pixel qualifies depends on the manufacturer's pixel policy for your exact model and on the seller's own return terms. Those are two separate things, so read both before you call.

Press on it with the tip of a pen cap, through a cloth, for a few seconds while the screen cycles through flashing colours. Fixed two of mine like that.

@Tyler B. please do not do that. Pressing with a hard point can crack the layers under the glass and leave a patch bigger than one pixel. Even the manufacturer advice I have read says a soft cloth and gentle pressure at most, and that is no guarantee.

From the office side: we log screen faults in the first week and ask the supplier to swap the unit during the return window. After that it becomes a warranty claim with a repair queue and downtime. If you have days left, use them. The store's return window and the maker's warranty are separate clocks.

A single dead pixel may or may not count as a defect. It depends on the maker's pixel policy for your model and on the seller's return terms, which are separate. Photograph it now, read both policies, and contact the seller inside the return window. Never press on the screen with anything hard.

What the makers say: Lenovo's dead pixel explainer separates a dead pixel (a constant black spot) from a stuck pixel (stuck on one colour). It says stuck pixels can sometimes be corrected, that dead ones may not be, and that the steps are to power the display off for a few minutes, try pixel fixer software that cycles colours, and at most apply gentle pressure with a soft cloth. If that fails, it points you to the warranty. It guarantees nothing.

Apple's Mac warranty page shows how cover is worded: hardware is warranted against defects in materials and workmanship for one year from the date of original retail purchase. That text does not say how many bad pixels make a defect. Policies differ between makers, and some publish a threshold per model, so ask support in writing which one applies to yours.

None of this depends on Windows or macOS. It depends on the manufacturer and on the retailer. Do not use a pen, a fingernail or anything hard: pressing the panel can damage it and turn one pixel into a larger patch.

One more thing: please do not install any program a website offers to "fix" a pixel. Stick to full screen colour pages in your browser, or the laptop maker's own diagnostics, if it has them.

@Marcus Hale thanks, that is clear. I will take the photos tonight, message the store in writing, and look up the pixel policy for my model before they reply, so I know what to ask for.