Question about Optiquest Q 71 17" CRT Monitor

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Dark Monitor My Optiquest flat panel 17" monitor became black after a Thunerstorm. The computer works fine. What is the solution?

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SOURCE: I have a Optiquest Monitor Q9. The Monitor had a

On most lcd monitors the cost of the screen is usually close to the cost of the whole monitor, my feeling is if your monitor is under warranty then they will send you another monitor. If not then your going to need to search on Ebay, Google etc to see if you can find a damaged monitor with a good screen and have it cost less then the cost of a new one.

Posted on Jul 06, 2009

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SOURCE: no sound

Is there a rca/headphone jack for the monitor? Make sure that the jack is plugged into the computer's audio out rca jack. A driver should not be needed for the audio on the monitor. If the jack is plugged in make sure that the audio is not muted on the computer. Right click on the speaker icon in the right bottom of the screen on the windows tray nand open the sound mixer. Make sure all the sounds are on. Then check the monitor settings and make sure the sound is on and not muted thru the monitor buttons. If the cable is good and all these things are ok then the internal sound amp in the monitor might be bad.

Posted on Sep 08, 2009

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SOURCE: My monitor is fine a day ago and today it says RGB

Check the VGA cable connections at both ends, also try the monitor on other PC to so you will know for sure if it is the monitor or the PC Video card problems.

Posted on Jun 09, 2010

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SOURCE: i have a optiquest Q20WB

More likley to have bad caps like other Optiquest monitors as shown in my albums.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed OPTIQUEST monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
Capacitors kit: he can make you a set of caps for you.

Posted on Oct 23, 2010

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SOURCE: I have an Optiquest Q19w

Make sure the VGA cable are on tight, try this monitor with another PC to make sure it is not PC video card problem.
This model is known to have bad caps problem also as shown in my pictures here:

Post back what you find.

Posted on Dec 08, 2010

  • 11361 Answers

SOURCE: Someone gave me an Optiquest

Look for caps with domed tops:
Replace them in a set.
Please leave rating if it helps.
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors:
Learn about bad caps:
Capacitors kit: he can make you a set of caps.
Or, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

Posted on Feb 06, 2011

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ViewSonic Optiquest Q7b 17" LCD Monitor has a fuzzy picture

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.

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I recently bought a Windows 7 64 bit PC. I have Optiquest monitor with built-in speakers. The sound was working fine and then it stoppped. I tried stand-alone speakers, then anoither monitor with speakers-...

Go into control panel / sounds / sounds and audio / select audio blind / should see a driver listed in each device. Back to sounds blind /test sound, if you can see the black arrow but its greyed out then driver is faulty. If you can click on it and it changes baxk to th esquare all is OK, ensure the sound jack is plugged into the GREEN ones at rear PC. Also check in volume blind that speakers are selected.

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1 Answer

No picture on monitor

The Q7 has a tendency to burn up transistors and a high voltage capacitor on the one half of the inverter board which is part of the power board.
I have repaired 1/2 dozen of these with that problem.
Only way to tell for sure would be to open it up and look at it.
If you can do that and send me a picture to, I may be able to confirm this.
The other possible problem could be a bad bulb, but since it is fairly new ? that is probably not the issue.

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Dell LCD Monitor Pictures, Dark Colors Course, Fuzzy, Pixelly

You might find a BACKLIGHT FLUORESCENT BULB on eBay.

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1 Answer

Monitor flashes on then goes black.

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.

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1 Answer

Monitor turns off and is dim

replace pwr inverter board...
replace the video/keyboard as well...

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1 Answer

View sonic Optiquest Q7B-3 comes on for a second then black


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 Make sure you order the 2SC5706. It is an exact replacement.

Good luck!

Dec 11, 2008 | ViewSonic Optiquest Q7b Flat panel TFT 17"...

1 Answer


It does indeed sound like a backlight problem. Generally speaking, the expense in finding a new backlight and having it fixed isn't worth it considering a new 19" monitor can be had for $150.

Jun 11, 2007 | Envision EN-7220 17" Flat Panel LCD...

1 Answer


If the monitor was dropped, most likely you damaged the internal components that provide the picture, whether LCD or CRT. Try connecting it to another computer. If this doesn't work, check the monitor's display settings or operating system display settings for contrast or brightness. NEVER open up the monitor, because there is a high voltage capacitor that stores voltage even when the monitor is off and could kill you if it discharges.

Jun 11, 2007 | Envision EN-7220 17" Flat Panel LCD...

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