Acer display X203H: standby not working

If the monitor is left in that condition long enough, does it eventually go to sleep? If so, it could just be the way the monitor is designed.

I'm experiencing the same problem with a macbook connecting with a vga cable (via vga--mini-dvi adapter.

Today, I bought an Acer S243HL .

I got a prompt reply from tech support at Acer saying:

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+Response (Jayaram K) - 10/07/2010 12:11 AM+
+Dear Marc,+

+Thank you for contacting Acer America. I apologize for the inconvenience that you have experienced.+

+I understand that the monitor displays "cable not connected", when the Macintosh goes to sleep mode.+

+As per our record your system is in warranty, but not registered.+

+Marc, after reviewing your mail I understand that the monitor has no hardware issue. In order to configure the display setting, please contact your computer manufacture.+

+I hope that you find this response informative.+

..hmm... I've written them back to say that their response is umm.. not informative.

I guess I'll return it if I can't resolve this. My other lcd monitor slept fine using the same cable/adapter/computer.

--Marc

It's worth a try. And as a bonus it should give a better picture, too.

Dominik,

I'm happy to report that switching from a VGA to DVI connection solved the issue for me. So, what I have now is an +Apple Mini-DVI to DVI Adapter+ connected to a +Startech HDMI to DVI cable+. (Yup, HDMI, because my ACER S243HL display has only VGA and HDMI ports.)

The display sleeps and wakes appropriately with this arrangement (ie the DPMS signals are being transmitted properly).

_Note on Adapters:_
My first attempt at switching to a digital connection was a +StarTech Mini DVI to HDMI Female Adapter+ (Model: MDVIHDMIMF) bought on Amazon. That failed. I can't say whether it was a defective adapter, or whether there is something inherent to the design of the adapter. (I tried different HDMI cables to rule out the cable.) I got a "No Signal" from the Acer display and my Displays Preference Pane never saw the attached display.

All my best, Marc
..spent embarrassingly too much time troubleshooting this...

If you want to confirm whether or not the Acer projector has a plug-and-display driver or not (required for Mac compatibility), you can download SwitchResX and use its "Export EDID" button to capture the projector's driver data (EDID) to a text file. If the projector doesn't have an EDID, I would ask Acer why, and then ask for my money back.