I have an iiyama T2738MSC prolite monitor connected to a mini pc with HDMI. Accidentally i turned from the OSD menu to DVI and now i get a no signal message. How should i turn it again to HDMI?

try this site.

http://www.iiyama-monitors.co.uk/categories/monitors/iiyama-23-and-24-inch-Monitor.aspx

I set the Default Source to HDMI and saved it an all has been good. Click the Main Menu button
Hit the + button and highlight Source Control
Hit the OK button
Highlight the appropriate source and hit OK
Hit + to the save and return

Look at this page
http://www.wizardanswers.com/liquidvideorepair.html
and see if your monitor is put together similarly.

Press the menu button and the power button in at the same time and hold it for 10 to 20 seconds.
Then turn the button power of en turn it on .
this should work

Any contemporary monitor is able to switch analog/digital mode automatically if connection from signal source to monitor is set up properly.

Connect digital output from your graphic card to DVI input of the monitor. Disconnect any other signal cables from monitor and switch on both devices (PC & monitor). Wait a while. Monitor checks its inputs and a activates digital DVI, because it is only one active input on it.

If none picture excluding error message of monitor is displayed, go through these steps:
1) Check whether your monitor is set for automatic input selection. If monitor buttons have no response try to use analog input to activate screen (any picture, desktop background...) and then get monitor menu access by pressing menu button.

2) Find out what connector type has your graphics card in PC. Possibilities are: DVI, HDMI, DisplayPort and some their options. See Wikipedia for connector look if you are not sure.
Remember that blue D-SUB (VGA) connectors are analogue and you cannot activate digital mode through analog VGA cable.

3) Use appropriate cable to connect monitor to PC.
Example: Your PC has HDMI output. Use HDMi-to-DVI cable. Your monitor input is DVI and common DVI-DVI cable is not suitable in case you have PC with the HDMI.
Note that DVI-to-DVI, DisplayPort-to-DVI etc. cables are available. You must buy right one.

Be aware that "Auto" button is inactive in digital mode of monitor.

previous suggestions doesn't work.

Just hold "Auto" button until the menu shows up (about 10s)

from iiyama tech support (UK):

1. Switch off the monitor.
2. Connect all 3 input types with live connections (VGA + DVI + HDMI)
3. Turn the monitor on.

It will select an input and display as normal.

I have tested this and it does work!
Good luck

OSD popup no signal If you are getting a message that says something like"Check cables" "no signal detected" or something like that,it is likely that your monitor is operating correctly. I would suggestchecking your cables, make sure that the computer is turned on, and if thatdoesn't help, check if your monitor has VGA, DVI, or HDMI inputs. I amthinking that your monitor may be trying to display from the wrong source. This is what a VGA (analog) cable looks like. VGA cables aretypically blue.

Another common connection that is used is a digital HDMI (left) or DVI(right) connection. DVI cables often have white endconnectors. How your PC connects to your monitor will determine thesource mode you want to use on your monitor. (Obviously this is the cableview but the connection on the monitor itself will look similar.)

If none of these tips helps, I would suggest hooking the same monitor up to adifferent PC or laptop, and trying once again to get a the display working. Again, make sure that the connection matches the source setting on yourmonitor. If it works on another PC, then your computer may have a videoproblem.
Otherwise, if it still does not work your monitor have a problem displaying viathat connection. If possible I would suggest switching to a differenttype of cable and re-try the above steps.

From time to time, I've the same white screen problem with my IIYAMA E1902WSV.

I can resolve that issue with a reset to factory settings.
1- Turn ON power (blue led)
2- Push on the MENU button and keep the button pushed while
pulling out the power cord.
3- Plug the power cord back while keeping the MENU button
pushed.

You should see the picture again.

Was there an installation disc that came with it in the package? Some monitors require software to be used. If you don't have the installation disc, you will most likely find the necessary software on the manufacturer's support site: ProLite Support Driver Download Site.

If the monitor software doesn't solve the problem, try using a different DVI cable. More often than not, these types of problems can be traced back to a faulty cable or port. If the DVI port on the monitor is bad, you will have to use the VGA port as you are now or replace the monitor.

If the DVI port on the video card is bad, you will need to replace it. A good way to test this is if you have another monitor with an available DVI port you can connect to the video card.

Hope this helps! Good luck!