Question 1

Does it have a head phone jack on the back?

Accepted Answer

No headphone jack.   Just VGA in and DVI in and power

Question 2

Is this HDMI compatible?

Accepted Answer

Oh no, I thought the question was for my Acer laptop.
No the Acer monitor is NOT HDMI compatible!!!

Question 3

Does this come with the DVI-I Dual monitor cable?

Accepted Answer

You can see it is included in one of the pictures, but I think is Single Link DVI-D. With Single Link you are ok since the monitor's maximun resolution 1920x1080@60Hz which is within the cable limitations, Dual Link means it supports higher resolutions.
 DVI-D means it only carries digital signal while DVI-I means it carries both analog and digital signal. Keep in mind this monitor has a DVI-D connector, so you can only put digital signal in it.

I hope this can help you.

Question 4

does this monitor have a headphone jack?

Accepted Answer

No headphone jack.  No built-in speakers.

Question 5

Has anyone had trouble with color?  Just got the monitor yesterday and have had a terrible time getting the display to actually look nice.  It's just a bright annoyance that gives me a headache

Accepted Answer

I have some issues with bright yellows, they display 'funky', nothing extreme and it is rarely an issue, but it doesn't happen with any of my other monitors.

Question 6

Is the power adapter 12volts?  See the small print on the module
I want to use it in my camper without an inverter

Thanks!

Accepted Answer

The fine print on the adapter reads:

Input: 100-240V - 50/60HZ
Output: 19 V (diagram) 1.58 A (diagram)

That's only mention of voltage i see on the adapter module.

Hope it helps.

Question 7

is it Vesa compatible ?

Accepted Answer

No, this monitor is not VESA compatible.

Question 8

Is this product compatible with a desk mount such as Rosewill RHMS-11002?

Accepted Answer

Short answer is NO. 
Long answer is the universal mounts need 4 evenly spaced screw holes that conform to VESA standards for monitor mounts. This monitor does not have VESA standard mounting holes.

Question 9

What is the aspect ratio for this monitor?

Accepted Answer

1920 x 1080 is a 16:9 ratio resolution. You can check by dividing 1920 by 16 and 1080 by 9 and if they both give you the same number (in this case, 120) therefore it's 16:9 ratio.

Question 10

What are the OUTSIDE dimensions of this screen (how tall with the  stand and how wide)?Acer G6 Series G236HLBbd Black 23" 5ms Widescreen LED Backlight LCD Monitor 200 cd/m2 ACM 100,000,000:1 (600:1)

Accepted Answer

Screen is 20" tall. Base is 2 1/8" tall, so total height is 22 1/8" tall
12 1/4 wide.
base is 10" long, 7" deep

This model does NOT have the 4 holes for mounting on an arm. 
hope this helps!

Screen Size	21.5"
LED Backlight	Yes
Widescreen	Yes
Maximum Resolution	1920 x 1080
Resolution	1920 x 1080
Refresh Rate	60Hz
Viewing Angle	Viewing Angle (CR = 10): 90 degrees (H), 50 degrees (V) Viewing Angle (CR = 5): 100 degrees (H), 70 degrees (V)
Monitor Pixel Density	0.248mm
Display Colors	16.7 Million
Brightness	200 cd/m2
Contrast Ratio	ACM 100,000,000:1 (600:1)
Aspect Ratio	16:9
Response Time	5 ms
Panel	TN
Horizontal Refresh Rate	30 - 80 KHz
Vertical Refresh Rate	55 - 75 Hz

Input Video Compatibility	Analog RGB, Digital
Connectors	D-Sub, DVI
D-Sub	1
DVI	1
HDMI	No
DisplayPort	No

Complies with	ENERGY STAR
Power Consumption	EnergystarOff: 0.53W (typ.) EnergystarSleep: 0.6W (typ.) EnergystarOn: 22W (typ.)

Regulatory Approvals	MPRII
Stand Adjustments	Tilt: -5 degrees ~ 15 degrees
Built-in TV Tuner	No
HDCP Support	Yes

Dimensions	14.35" x 20.10" x 6.60" w/ stand
Weight	4.50 lbs. w/ stand

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Acer 21.5" 60Hz TN LCD Monitor 5 ms D-Sub, DVI G6 Series G226HQLBbd (UM.WG6AA.B01)

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Brand	Acer
Series	G6 Series
Model	G226HQLBbd (UM.WG6AA.B01)
Cabinet Color	Black

Item#: 9SIA0AJ2966220