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Xerox tft 19" model 900w poers up a few seconds, seems riddish in colour, then goes to standby

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Xerox tft 19" model 900w poers up a few seconds, seems riddish in colour, then goes to standby? This trouble maybe power supply or inverter boards is defective.
first you can test the voltage of the multr,and then check which part is defective.From Wisiny.com can find those parts
if you have any question,please let us know email:service@wisiny.com.thanks,we sincerely hope we can help you!
you can also check this boards whether suit you:
200 003 190DTLB5 BH Xerox 860 AB0 190DTLB5 PSH Power Supply Backlight...

Posted on Feb 28, 2015

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wayez3
  • 20 Answers

SOURCE: NEC 19'' LCD monitor power on but screen blank

If you can try it on another unit , If it still does not work, Then the most likely culprit is a bad power supply. If you know any thing about soldering replace the capacitors they are probably bad but being that these things are being built so cheap.It could also have a bad inverter. not repairable by average dude.If you open it be careful and do not attempt unless you feel comfortable with a solder Iron.Hope this can help you Good Luck. www.IrionsTVshop.com board re builders.

Posted on Feb 29, 2008

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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well if your lcd has no bulge capacitors test your tft lamp both top & down of the screen( particularly top) with spare tft lamp. or use another screen to test it. secondly, test the c5607 transistors in the inverter section but if you know how to use spare tft lamp very well , you will easily detect between your screen & the inverter

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XEROX Monitor Product No : XM3-19W Model No: 900W Power: AC 100-240V 50/60Hz 1.2A Problem : " RGB Analog " When Starting the monitor afte 3 second display and then Black screen.


Common failures in LCD monitors are due to bad caps as hown 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 monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
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:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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Thank you for answering those questions. That usually indicates it has a bad power inverter. From what i can tell, that monitor is a few years old. You can attempt to find an inverter online to replace it yourself (usually about $50 if you can find one) since its no longer covered under warranty, or put that money into getting a new monitor.

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It can be the back light inverter board is bad or bad caps in the power supply. You need to see if you do have 12~18vdc feeding the inverter section.
http://s807.photobucket.com/albums/yy352/budm/Bad%20capacitors/

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Monitor turns off after 4-5 seconds


hi every one, i hope this helps and am proud to say/or not that i am now using my philips php-19x (aka proview 900w/Mag LT916s Model 900p/ Xerox) and yes turn on the monitor 2 seconds screen goes black and the blue power light stay lit, but if you shine a torch onto the screen you can see the lcd display is working, and if you turn the power off and on the cycle starts again, like most of us we checked the web to no avail, untill yesterday. I have been playing with this monitor for 3 months on and off after a kind fellow gave me this monitor for free on uk freecycle and of course i checked all the caps on the psu/inverter pcb and more components all seemed fine checked the ccfl lamps by taking them out of the lcd panel (15 minutes to dismantle) both lamps where fine not orange, a nice bright light, and knowing that if the monitor started woking ok and the back lights did not fail it would run like this for ever until you turned the monitor off / video blanking so i was convinced that there was no fault with the psu/inverter board, and as i stated i found the solution at last (yeh) and here it is many that's to all on the bad caps forum and of course the main man -----barry wilkins-----

Re: Mag LT916s Model 900p 19" LCD dropping like flies

I have got to the bottom of this ,after I got one of scopes out (PM 97) the output of the TL 494 IC was disappearing .The IC seems to crash easily ,I think the oscillator on pins 5&6 actually stops.
I cleaned the whole board with an aerosol of PCB cleaner and heated up the PCB up with a small craft heat gun to quite hot .
I fitted a 0.01 mfd capacitor across the IC pins 12 to 7 to decouple the VSS supply ,because I felt the cause of the IC stopping could be interference based
The monitor now runs for all day with no sign of the backlights cutting out.
I found out this LCD display was made by proview.

Barry Wilkins
john r uk.

Sep 05, 2008 | Computers & Internet

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