Question about Xerox XG-91D 19" LCD Monitor

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Would flicker then die

I decided to try using a hair dryer to help heat this unit up and it works like a champ, screen now stays on is clear etc. By raising my phase from it's default to 18 or setting my refresh rate to 70 will that help this unit to generate just a bit more heat? I have it set so that it dosen't go off (hibernate) so I won't have a start problem. Any other ideas?

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You have a bad capacitor on your power supply board. Take unit apart and look for some blown or bulging capacitors on the P/S board (the tan one) they look like little barrels wiht a cross embossed on top. If the top is split or looks like it is about to, you can replace them easily with a soldering iron, heat the solder and pull the cap out one side at a time. the install is just as easy, put it it phased properly (it has a negative and a positive pin) and heat pin and pad together until solder flows onto them, not more than 5 seconds. Sometimes you can use the solder that is already on there. They are about .35 cents online or 1.25 at radio shack, look for the large ones that say 470 microfarad at 25V and 105C. If you cant find that particular one, you can use a 35V model but stay with the 105C rating so it doesnt fail under the heat of the P/S. Of course you should always take the bad one with you if you are shooping for a new one. You may have 8 bulged caps on your board, replace them all. repair shop should do the soldering for you for a few bucks if you give them the parts and watch him. Applies to most flickering or dead LCD monitors. Other thing to check is the small black IC chips on the logic board to see if any are burned or blistered. That is more involved but is not impossible.

Posted on Apr 11, 2008

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More than likely there are some bad caps in the power supply. The backplane power supply and main power supply caps tend to give problems in many of these types of monitors.

You should get it serviced before the cap goes completely defective. If it goes opened or shorted, depending on many circumstances, other damage can happen. This will increase the cost of the repair.

Jerry G.

Posted on Apr 14, 2008

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Craneman, you are a genius! But I can't stop laughing! I knew from before that this problem was due to a warm-up issue within the monitor's power unit, never would I have thought to use such a primitive solution! I was waiting to bid on a monitor just now so I decided to do a search and found your solution, decided to give it a try, and voila! The hair dryer's heat helped warm the monitor up to the right temperature (I suppose) and the next time I restarted the monitor it came right up!

Posted on Mar 21, 2008

  • Anonymous Mar 21, 2008

    Apparently this is a pretty common problem on Xerox XG-91D 19" monitors. The symptom starts to show after a couple of years - basically the monitor's display would work for less than 1 second (more like flicker yes!) and then go dark. Pressing the power button on/off repeatedly would reproduce the same result. I don't remember how it started to work again in the past, but the hair dryer solution sure brought it back up after about 10 seconds of warming up. Just to play it safe, you may want to start with the "Warm" setting instead of "Hot". Now make sure to put a sticky note on the power button to warn people not to turn the power off again!


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You should NOT have to warm up your electronics! (This is BAD)
One of the components on the pc board in your monitor is BAD and should be replaced.
1. Take it to a qualified repair center.
2. Make sure that they do COMPONENT LEVEL repair! (most dont)
3. Your repair bill should be less than $100.00
My shop charges $68/hr for bench work + parts.
Good Luck

Posted on Jan 18, 2008

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