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Alexandre Botella Published on October 18, 2010
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  • Screen size 24 inches
  • Panel type TN
  • Resolution 1920 x 1080 pixels
  • Response time 2 ms
  • Inputs (HDMI / DVI / VGA / Component) 1 / 1 / 1 / 0
  • Other details NA
Acer has launched the S242HL, a Full HD monitor with LED backlighting.  It has an ultra-slim TN panel with a 2 ms response time, making us think that it might find favour with gamers, something the Taiwanese manufacturer has confirmed by giving it a glossy finish all over.

Hardware: VGA, DVI and HDMI

Like anything made of black plastic, the S242HL's body is very susceptible to picking up greasy fingerprints.  You'll want to get a cloth out every time you touch it.  But then again, given that all you can do is tip it back slightly, that won't be very often.  The inputs are made up of the trio of VGA, DVI and HDMI, but Acer has unfortunately totally abandoned audio.  The S242HL doesn't have speakers or a headphone jack, making it hard to pick up the audio that comes via the HDMI cable when you connect this monitor to a TV decoder or a games console.

Responsiveness: some reverse ghosting

It seems that Acer has repeated the mistakes it made with both the S243HL and the S273HL: the new S422HL suffers from severe reverse ghosting.  If you've never heard of this problem, it results from a failed attempt to artificially boost the responsiveness of a monitor.  It means you can see ghost images trailing behind fast moving objects which stand out a lot from the original image because of their inverted colours.

   Light Background Dark Background Average
This graph shows the time, measured in ms, that the monitor takes to entirely remove the previous frame.  The shorter the time, the more fluid moving images will appear.

Fortunately, the reverse ghosting is almost impossible to spot when using office applications.  If you really like the look of the S242HL, you can use it for writing e-mails and browsing the web.  But if, on the other hand, you want to play games, there's no chance that fast moving objects will appear smooth.  Gamers should look elsewhere.

Colours not quite right

With the factory settings, this 24'' monitor produces colours which suffer from a strong blue tinge, and an uneven distribution of luminance across different shades, or gamma.  Its deltaE, a measure of the average discrepancy between the colours requested by the graphics card and those actually shown on screen, is 4.0.  This figure usually needs to be below 3.0 before a display can be said to have accurate colours.

Measured Colours

Ideal Colours
Compare the S242HL to other LCD monitors in our Product Face-Off

Unfortunately, there wasn't any way to improve the settings using the onscreen menu, so the only way to get accurate colours is by trying a calibration profile.

The contrast ratio can't save the day either.  The S242HL is stuck at 750:1 but the average measured across monitors is around 850:1.
Movies: like any other monitor
As with all monitors, movies look blurry and upscaling of SD sources needs a lot more work. You shouldn't think twice about leaving the job of upscaling to another device, like a DVD player, so the S242HL gets a 1080p signal directly.
The good news is that the reverse ghosting which you can spot while gaming or using office apps is invisible in movies.


  • Low input lag


  • Reverse ghosting very visibile in game
  • Contrast below average
  • Colours aren't reproduced accurately, and can't be adjusted


This monitor is only really good for office work or browsing the web. Even then, you won't want to wait long before using a calibration profile.
3 Acer S242HL DigitalVersus 2010-10-18 00:00:00
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