I have a dlp acer projector when i connect it to compaq desktop computers it works perfect but on other computers , laptops it shows no signal. assist.

Reduce the screen resolution to 600x480 for instance and see if the projector can handle the low res output OK. Then increase screen resolution on the PC unitl the error message appears. Try the video menu settings in the acer

1)Plug in either the vga or dvi into both the projector and the laptop.
2)Plug in the power cord to the projector,then turn the projector on.
3)Once it has past its warm-up period,find the function key on your laptop.(Fn)
4)Along the F1,F2,F3 ect keys,press find the one with the picture of the display.
5)When you have found it,hold down Fn and press the display key down until it clones the laptop and projector.

Then 'No signal' or 'unsupported signal' messages are usually because your display is set too high. To see if this is your issue, hoop it back up too your computer & set the computer to the basic VGA resolution. Assuming you are using windows, right click a blank area on the desktop, click 'properties' on the dropdown menu, click settings. Write down the numbers in the 'screen resolution' and 'color quality' boxes, then drag the 'screen resolution' all the way down to then 'less' side. Then change the 'color quality' to the lowest setting. Click apply, then answer yes (the display will look UGLY - don't worry!!) Now connect your computer back to your projector. If it works, then the resolution you use on your desktop monitor is not supported on your projector. Experiment with different resolutions to see which one looks best on your projector.

Note for Laptop users-- By default the VGA connector on your laptop is off. To turn it on, look for a blue symbol on one of your function (F1, F2, F3...) keys. It looks like an old TV with a line on both sides 'O' (F4 on HP) Press & hold the blue <fn> button (on the lower left of the keyboard, usually to the left of control <crtl>) and tap the bleu button you just found. Let go & give you

you need to go to te control pannel and go to display settings then manually select the external monitor then hit apply it will open on your projector

Keep the computer on when you plug it it
so have the computer ready

THE DRIVER FOR THE PROJECT OR THE INSTALLATIONAL SOFTWARE MAYBE USEFUL

After half a day of tinkering around with my new Acer I fixed my problem, which I think is yours also. I connected it to my notebook, it read the signal 'D-Sub' or something like that, and after my notebook finished startup, it reverted to no signal. I tried it with my desktop and it worked just fine. The display will only show up on one output device. It worked fine on my desktop because I was unplugging my monitor in order to hook up the projector. Hooking the projector up to my notebook left the display panel still active and that was where it displayed. In case I'm not making sense, the solution is this: After setting everything up, hit Control+Alt+F1 to switch display from your screen to the projector. To switch back, hit Control+Alt+F3

Try it with 75Hz for the second monitor and use the VGA input.

USB/serial is only for configuration.

Thomas

I have the same model of Acer and it worked in all of my classroom LCD with powerpoint lectures and with a SONY TV at home. Try right-clicking your screen to view the NVIDIA control panel. Configure "dual" multiple display (costumize to "dual" configuration or "forced-detect."