Dillemas on buying LCD Monitors

[rion]

more than a month ago, when I bought a samsung lcd, I realized the backlight is faulty. returned it and waited for 3 weeks, but no stock was available, so I ask for refund in the fourth week. this time, I bought a samsung 2232gw lcd on another store, the night I brought it home, I realized it has dead pixel. waited for another week for a stock, then the manager says their supplier does not honor on dead pixel, only dead pixels more than 6.

is samsung this bad? and is it true suppliers will not recognize one dead pixel?

[aga_cruz]

sir hindi nyo ba nakita yung dead pixel nung binili nyo? may mga LCD ako dito kaso ang nagiging sakit lang nila e nagkakaruon ng bubbles?

[flakez]

wow! this is scary. kakabili lang namin ng samsung lcd. sana naman hindi magkaproblema

[StraightSix]

I remember the same policy when I bought my first Samsung screens 7 years ago - a PC monitor and a monitor/TV - though I can't remember the exact number of dead pixels to warrant a replacement. The gist was that Samsung cannot guarantee all pixels to be working on brand new units. No such thing was mentioned when I bought Sony LCD's, though that was years later.

In fairness both Samsung screens are still faultless.

[rion]

btw, wrong spelling pa pala yung title ko, sorry...

I have no idea what dead pixel looks like, sa back screen pala siya makikita. kaya hindi ko na kita ng pinatest ko. sa anaolg pa na plug...

but I was able to prove them today that the DVI is not working, when we tried it to my pc and theirs.

so puwede na ako mapalit ng iba. peru wala pang 2232gw stock. buti nalang binigyan ako ng service monitor, though 17" 4:3 lang. atleast better compared sa unang tindahan na hindi ako binigyan ng service unit.

sabi nila, normal daw na may atleast 1 or more dead pixels sa lahat ng unit, at hindi nila recognize yun ng supplier, suwerte lang kung may stocks pa at puwede pa ipagpalit sa tindahan........ but I find it unacceptable companies cannot guarantee a dead pixel... is our LCD quality assurance that bad?

kaya guys, bago kayo bili, dapat test ninyo lahat, at test sa dead pixel sa black screen.

[StraightSix]

A few dead pixels are OK with some manufacturers because of manufacturing limitations ... while some have a zero tolerance on dead pixel/s. LCD monitors also have a classification based on the number of allowed faulty pixels called Pixel Fault Class, but it's only a guideline and not mandatory. Google ISO 13406-2.

I have no idea what dead pixel looks like, sa back screen pala siya makikita. kaya hindi ko na kita ng pinatest ko. sa anaolg pa na plug...

...

kaya guys, bago kayo bili, dapat test ninyo lahat, at test sa dead pixel sa black screen.

That's not a dead pixel.

- A dead pixel is a pixel that stays unlit. Best to see against a white background.

- A hot pixel is a pixel that remains lit as white. Best to see in a dark background.

- A stuck pixel is a pixel that remains lit - usually as green, red or blue (or a combination) and is most visible in a black background. A pixel have 3 sub-pixels ... red, green and blue.

It's a common mistake to refer to a stuck pixel as a dead pixel. Stuck pixels can sometimes be fixed (not 100%), while a dead pixel is, aah, dead. Here's a sample of a software that tries to revive a stuck pixel:
http://www.jscreenfix.com/basic.php

[rion]

ah I see... hot pixel pala tawag nyan. thanks. the DVI is faulty, kaya I still need to have it replaced.

dead pixel , hot pixel, bubbles... bad backlight...dvi not working... LCD quality seems really bad compared to crt quality ratio.