Det finns en standard för defekta pixlar på LCD-skärmar. Tillverkaren kan själv specificera vilken klass skärmen tillhör och därmed i vilka fall du kan returnera skärmen. Man har också 14 dagars full returrät enligt distansköplagen som jag tror gäller 14 dagar efter att produkten har mottagits.
Så här ser standarden för defekta pixlar ut idag:
"ISO-9241-302, 303, 305, 307:2008 pixel defects
Of particular interest to the lay computer user are the definitions of flat-panel TV and monitor pixel defects provided in the ISO-9241-3xx series of standards (which renders obsolete ISO 13406-2). These identify three classes for measuring pixel defects in flat panel monitors:
Class 0 panels are completely defect-free, including no full pixel or sub-pixel defects.
Class 1 panels permit any or all of the following:
1 full bright (“stuck on white”) pixel
1 full dark (“stuck off”) pixel
2 single or double bright or dark sub-pixels
3 to 5 “stuck on” or “stuck off” sub-pixels (depending on the number of each)
Class 2 panels permit any or all of the following:
Class 3 panels permit any or all of the following:
(allowed pixed defects per 1 (one) million pixels in the TFT/LCD matrix)
As of 2010, most premium branded panel manufacturers specify their products as Class 0, expecting a small number of returns due to early failure where a particular item fails to meet Class 0 but would meet Class 1. Budget panel manufacturers tend to specify their products as Class 1. Most premium branded finished product manufacturers (retail TVs, monitors, Laptops, etc.) tend to specify their products as meeting Class 1 even when they have a Class 0 specified panel inside. Some premium branded finished product manufacturers have started to specify their products as Class 0 or offer a Class 0 guarantee for an additional premium.
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Edit: Verkar som många tillverkare fortfarande hänvisar till ISO 13406-2 istället. Jag tycker det är rätt dåligt att dom inte skriver ut tydligt vad det är som gäller.
