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Re: NuTech QL-711V Monitor - no picture
Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages. Good Luck!
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This is a failure of the circuit that runs the fluorescent lamps that light up the screen or possibly a bad lamp, I have seen both types of failure occur. It is possible it can be repaired but if you take it to a shop the repair can cost a significant portion of just buying a new monitor. I repair some and toss some depending on the economics of each case individually.The lamps are too much trouble to bother with, and the power circuits can be both simple and complex depending on what part failed.
Does it do the same when it is hooked up to another PC?
If it is monitor problem, then please read on before DIY repair. If you are going to DIY and already try the monitor with another PC, 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 monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/ Post back what you see inside so we can guide you further and it will help out other people in the future also.
Hi! there are possible reasons why your monitor shows nothing on your screen...
First, you need to check if the power cable of your monitor is well connected to a wall socket or AVR (and that you are sure there is supply output current on the AVR or in the wall outlet)
IF found that power cable is fix and secure... my suggestion is you bring the monitor to a credible technician...Because the possible reason why only black is seen on your screen, is because the backlight inverter could be busted already.. the backlight inverter which is located on the upper and lower back edge of the monitor is the light source responsible for giving image display of your lcd monitor.. Another reason could be is a deffective high voltage ballast transformer which is responsible for generating high votlage supply for the backlight....
It is too risky for you to do the repair by yourself without proper knowledge and right tools to do this.. So don't waste time consult a technician and or possible avail of the warranty if there is any...
nonnie707, It is very possible that your monitor's internal or external (lay on floor) "switch-mode-power-supply" has a problem. Prove that your pc is working by connecting KNOWN GOOD monitor to your pc!!! If you are not electronics technician then you will need to question Gateway as to warranty service or possible swapout for a REFURBISHED unit if your unit is deemed as premature failure. May cost $ for swap. READ my FIXYA profile and that of other FIXYA TECH's (buddymc, budmrtn) for more options as to "what to do"!!! Remember, If very strange and weird things start to happen (occur) with "cold-cathode-fluorescent-lamp" backlit LCD display, the first place I would investigate would be the units "switch-mode-power-supply" Good luck with the repair. 12fixlouie
bburgert, Hi, 12fixlouie here. Possible problem with "switch-mode-power-supply" or the "cold-cathode-fluorescent-lamp" power supply that is called the "inverter circuit" which lights-up the CCFL lamps. use warranty service if possible. Yes, it could be a broken trace, but more likely a "cold" solder joint or possible bad (failed) capacitors on SMPS board. You or electronics technician will need to visually inspect SMPS/inverter for top 2 causes of BLACK or BLACK and BLANK LCD monitor failures. Read more of my responses in my fixya profile and see if they will help you make decision on what to do. A trip to YOUTUBE will also help if you need to see what is inside a typical CCFL backlit LCD monitor!!! Also try www.ccl-la.com/badcaps.htm that is run by another fixya tech nickname of buddymc. Lots of good info already on web about YOUR monitor symptom. Some are repaired quite easily by owners who are handy with soldering pencil and solder and some basic hand tools of electronic nature. Good luck on the repair. If this was of some use, then rate it on fixya. Bye for now.
jcacolice, Most likely your 931c will need work done on it. When strange things start to occur with any LCD CCFL backlit display I would suspect the "switch-mode-power-supply" first thing!!! If unit is out of warranty you or someone will need to inspect and troubleshoot it. A good place to start will be to see some DIY videos on YOUTUBE. Try search of "lcd monitor disassembly" and "lcd monitor repair" and learn all you can about the TOP CAUSES of monitor failure. Then visit (FYI) www.ccl-la.com/badcaps.htm and www.badcaps.net for more info. Explore ALL your options before you do anything. Then get back to us here at fixya if you still need some asssistance. Read some of my other responses in my fixya profile and other those of other tech's on fixya.
Hope to see you back on fixya with a plan of action!! 12fixlouie
Hi, I had the same problem and I wrote an email to Nu. They wrote me back that I should use the Factory reset feature which you have to go through the Factory Menu to get to. Instructions to do this are as follows. I got to the menu my first try but it has been a pain to get back to it. I hope it will be easier to access for yours.
Hope this helps
You will need to display a gray scale picture which varys from black to white
You will need to display a gray scale picture which varys from black to white.
Displaymate 16 grays pattern is good or something like the picture to the right.
Press and hold SEL/AUTO and press the power button. Then release the SEL/AUTO button.
Press the MENU key to display the factory menu.
Sencore 11 gray Pattern
Press the and select FACTORY2 menu. Factory2 is at the bottom.
Press SEL/AUTO to select the FACTORY2 menu.
Press the to select AUTO COLOR.
Press the to run AUTO COLOR. Wait until finished.
You will see the colors changing and then become stable when finished. About 10 seconds.
Press the and select COLOR UPDATE.
Press the to run COLOR UPDATE. It will finish quickly. < 1second.
Press MENU to exit the menu. Power off/on.