Re: View sonic Optiquest Q7B-3 comes on for a second then...
Don't know if this will fix your problem, but my monitor did the same thing. If you look on the bottom of the power supply board, you will find Q305 and Q306. They are probably both shorted. I replaced both transistors and the capacitor C305 on the top of the same board. The capacitor was open. After I replaced the parts it is working again. Look with a magnifying glass and make sure there are no bad solder joints. The only place I could find the transistors were at www.bluestar-online.com. Make sure you order the 2SC5706. It is an exact replacement.
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LCD monitor needs to be fed with native resolution from the PC video out, this monitor native resolution is 1280x1024 @60Hz, try that setting to see if it helps before opening up the monitor to look for failed components.
First check your cord from the computer to the monitor to make sure the connections are clean and good on the blue vga cord. Plugging it in and out a few times will help clean the pins and holes. If that is ok: then it may be bulbs. Pink means that you have bad bulbs inside the screen. sometimes the pink goes away when the bulbs warm up. eventually it won't stay on. There is a slight chance the power board is also getting weak. You would have to open it up to tell this. Once partially opened, Disconnect the wide set of wire that goes from the back of the screen to the monitors main video board and then try to turn it on, If it is still bulbs they will really show up with this setup. If you send me a picture of the power board to email@example.com, I may be able to tell if the board has issues by looking at the picture of it. Fran
This happened to me and I was able to fix it. I cracked it opened and found a bad capacitor, bought a replacement at Radio Shack and I'm back in business. Actually using it right now to post this.
I think you have the display shut off. the button on the bottom left will shut screen off. It will come on for a few seconds if you touch the screen, but will shut off again. just push the display button again and it should stay on.
I had the exact same problem. The screen went black and the green light flashed. I went ahead and took the monitor apart (scary) and took a look at the power supply circuitry. I saw 6 suspicious electrolytic caps on the board. Three 470uF 25V 105 degree C caps, two 1000uF 10V 105 degree C caps, and one 470uF 10V 105 degree cap. They all appeared to be slightly bulging and one even had a small hole in the top. I decided to replace all of them. The parts cost a little more than 5 bucks. I couldn't find a 470uF 10V cap at my local store so I bought a 16 V version instead, which is fine. Anyway, after replacing all 6 caps, the monitor works as good as new.
Actually that model has an integrated inverter with the power supply. Should be part # xlm1700390004 they cost around 25 bux and are fairly easy to replace.
If you are handy with soldering you could check the three 470 uf caps on the board they are tank caps and when they go they do what you are describing. Open the monitor and look at the three black capacitors if the top is bulged they are bad. If you have a capacitance meter check the capacitance it will most likly be well below 470 uf the caps are cheap like 39 cents if you do go this route use 30v not 25v caps to be on the safe side.
Word of warning switching power supplies can kill you quickly never work on it live and let it discharge at least an hour before working on it.