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Monitor Buying Guide 2026: Complete Testing Checklist

Don't waste money on defective monitors. Our complete testing checklist helps you identify issues before purchase. Updated for 2026 with the latest panel technologies.

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Expert-researched product recommendations with real Amazon links

What to test, and what to replace it with

These tools exist to tell you whether a screen is worth keeping. If it is not, these are the panels worth running the same tests on instead.

LG C4 65 in OLED evo LG C4 65 in OLED evo

The panel most of these test patterns are written against. OLED is where the dead-pixel and uniformity tests actually matter.

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Samsung S90F 65 in OLED Samsung S90F 65 in OLED

The main alternative to the C4 at the same size, and the one worth running the same tests on before you keep it.

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Calibrite Display Pro HL Colorimeter Calibrite Display Pro HL Colorimeter

Test patterns tell you something is wrong. A colorimeter tells you by how much, and fixes it.

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Dell UltraSharp U2722D Dell UltraSharp U2722D

The safe QHD desk monitor when a test turns up a panel you do not want to keep.

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