My monitor occasionally blacks out. I turn just the monitor on -- wait a few minutes then it works ok for a while until it blacks out again

I think yiu also need to check your RAMs. Just use the one RAM and try by replacing and cleaning one by one. Thats only option you can check it.

Fix One: Plug in the monitor and power it up. Hold down the Powerbutton until you get a message saying "OSD Unlocked". If the problem persistsafter OSD is unlocked then unplug the monitor from the wall, wait 20 secondsand try again. Fix Two: Turn on the monitor and hold down the Menu button for 10-20seconds. This should unlock the OSD. Fix Three: Turn off the monitor, press down the Menu button and thenturn on the monitor. Wait 10-20 seconds. This should unlock the OSD.

Hi, the problem is in the monitor. Just can check in other computer to see it. The monitor will be failing anyway

The dialog box you are seeing means that the monitor is not receiving a signal from the computer.

check your cable going from the monitor to the computer. if the cable seems ok, hold the power button on your towerr until it turns off, then wait 5 seconds and push the computer power button again.

Cheers

could be your pc vga card?

could be loose windings on a transformer cause slight vibration usually silicon spray cures this fault

Hello there:
what you will need to do is boot the machine into bios setup screen and look under the section where you see the video graphics section and click on it now look to see if it says agp or pci it should be set to your type of a video card either pci or agp if it is set to pci and you have a agp type card than switch it to agp or you can do vice versa and see which one works the best for your system ok?
Tthan simply save settings and reboot.
this should take care of the problem.
best regards michael

I am not 100% sure but I guess that the system board on the monitor has been overheated and therefore will require replacing.

You can get it tested but certified engineer local to you.

Please let me know how you get on. In the mean while I'll do a bit more research into this on your behalf.

Best of luck

Philip

Try reseating the Graphics card first..It may be loose. Or try it in a different slot.

I have exactly the same problem with my Benq FP71E+ ..

What i found is a temp fix is this :

When monitor dims and goes black i turn it off , hit the bottom left side (near the BENQ logo) turn it on again and it works ..

This works every time for me . But after a while it switches off again , could be 5 minutes could be 5 hours . Its random