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It's dying. Pretty much simply that, something electrical or electronic (connections from panel to panel edge connectors, connection to circuit board, or internal to a panel matrix chip). Very likely unserviceable, if under warranty, take it back for service. Only other thing, check connector under back of monitor (if it has a connector at both ends). It's an Acer monitor, they aren't terribly durable, so if it's more than 2 or 3 years old, it's probably on it's way to deadville.
Have you verified that the problem is indeed your monitor and not the video card on your PC? i would start by connecting the monitor to a laptop or another PC to verify that the same issue occurs no matter what the source. Once you've verified that, you're likely dealing with a monitor that requires repair or replacement. Hopefully it's under warranty. Hope this helps a bit.
1. Please try to use a different Monitor just to check if you still see the white screen.
2. If you still see the white screen on a different monitor, then your video card is affected.
3. But if you don't see the white screen using a different Monitor then, I would say that your monitor is defective, now if your monitor still under the warranty, I would suggest to get in touch with your manufacturer so that they can fix or replace your monitor.
I would say your monitor is bad if you have tried it on 2 different monitors and it does the same on both. Check your warranty expiration date, some monitors have 2 or 3 years warranty. If it's still under warranty, you may be able to have it replaced or repaired.
I have the same problem with my LCD tv... The DVI-D (white connector in the back) and the D-SUB (connector on main-board next to the DVI-D) work great for my computer. However, the antenna returns only a white screen no matter what I plug into with it using a coaxial cable. Judging by the modular configuration on the TV (1 main board with LCD monitor attached to it and the 2 computer inputs, and a smalled board on the back with the antenna, component video, S-video, mini-jack out, and composite video.) I think the smaller board which I believe is called a "NR Unit" is what has failed. I took off the back mini-panel of the TV off, which just slides off when you press down 2 tabs. And, I found the small board which is only held down by 5 small screws, and it pops right off. So, if you can find a NR board from westinghouse that works, it's a quick and easy (hopefully inexspensive) replacement. Hope this helped.
My name is Todd and I'm a customer advocate at Dell's corporate headquarters. My team helps customers via blogs, forums, and other tech sites online.
You said the monitor is 2 years old. Do you have the original order number still? Depending on how you purchased the monitor it may have up to a 3 year manufacturer warranty and I may be able to replace it if it is within that warranty period.
Please email me at Customer_Advocate@Dell.com if you can locate the order number and I'll be glad to see if its still under the manufacturer warranty. Include my first name (Todd) in the subject line of the email so it can quickly be routed through to me, and include the order or customer number if you have it.
Try sending monitor back as most Benq monitors come with at least a two years silver warranty.
Benq are very helpful and their repairers are quick and polite. You will find their no.s on their website www.benq.com my monitor was experiencing the same and for $10 postage and a one week wait is repaired and working fine.