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When the computer is booting up, can you see the POST? No matter what resolution you set the computer to, you should at least see that if your computer is indeed working. If not, make sure your monitor is set to the correct input (DVI or VGA); there may be buttons for you to go into a menu system to select input. If you can see the POST but the monitor says "no signal" when Windows loads, then you'll need to go into SAFE MODE to change the resolution. To select that, press F8 just when Windows is beginning to load.
If it says no signal input, then your computer is not putting out a signal. Possibly a bad video card. Also can be a computer that never really boots up and passes the POST. Unless the POST completes, it won't send a video signal.
The Viewsonic VX2235WM has a known issue with the power supply going out. The flashing power light or no picture is the classic symptoms of this issue. Check out our web site at: www.ccl-la.com. We have a step by step repair guide posted that will guide to doing the repair yourself. It involves changing a few capacitors on the power supply. If you can solder then you should be able to do the repair yourself. If you don't want to do the repair we do offer a repair service for $35 plus return shipping. If you have any additional questions just let us know at: [email protected]
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Your PC isn't working, the "CMOS Checksum Error" is a BIOS error. It has nothing to do with the monitor. You have to let the PC load the default settings and try to boot up, if the defaults doesn't work, you have to reconfigure the options in the SETUP program. To enter Setup press "Del" or "F2" in the POST screen.
My apologies for the rude treatment you received from one of our Experts. I have deleted his post. I will be dealing with the Expert personally, and will also request that one or more of our Experts who are familiar with Acer Monitors come assist you with this question.
Again, on the behalf of FixYa, I offer my most sincere apologies.