Question about Dell UltraSharp 1704FPT 17" Flat Panel LCD Monitor
I have a Dell 1703ft 17" UltraSharp LCD with an *intermittant* problem. The monitor appears to be getting power, and the light on the power button correctly displays orange or green when it should. However, when it's turned on (to a computer with a video signal), or when it's woken from sleep (as in turning on the computer), the screen displays neither the video it should, nor any test pattern. Changing inputs also doesn't produce any text on the screen, or any test pattern. Rather, the screen flashes once very briefly, then goes completely black as if it's not on at all. I can't get any OSD to appear, or any other messages. This LCD has been plugged into several different computers, and repeated the same problem. It always flashes once, and then nothing. The same computers have been tested with other monitors, and work fine. The VGA and power cables have been swapped for different cables, and the same result occurs. The problem is most definitely in the LCD itself... I'm comfortable with all areas of repairing computers and other electronics, (including using DMMs and soldering), but I can't find a repair manual for this LCD, or any other troubleshooting guide that goes past determining whether the problem is in the monitor or elsewhere. The problem is in the monitor. Where do I go from here? Is this a common problem for which I can check just a couple of internal components, like a fuse or a capacitor? Also, I suspect that the problem shows up when the monitor goes into a sleep mode. It'll work for days on end without fail, then I'll come home one night and it's asleep and has this problem. Leaving it disconnected from everything for a while has allowed it to work again when reconnected, but I have no idea how long it has to be disconnected, or if I might just need to ground it or discharge something. Any suggestions would be greatly appreciated. Thanks in advance! :)
Hi
I have dell E172FPb model LCD monitor , the first problem was it blink yellow led and the screen was blank . I open the monitor and i got the two transistors c5707 was shorted , then after i changed the failed component it worked good for a month and so , but after one month the same components have failed again , I tried to find the other components that might cause the failure of the transistors on the inverter board but i didn't get any, then I changed the failed transistors .now the new problem is the power button is blinks green but no image on the screen
is there any help
Abebe
Posted on Feb 15, 2008
An expert who has achieved level 3 by getting 1000 points
This is most probably cause by one or more Faulty Electrolytic Capacitors, I find these are the MOST commonest form of "Fault" in these LCD's TFT's units. I ususally simply replace "On Spec" all High Value Electros, in fact ALL Electro's are suspect and often I just "Shotgun" and replace 'em all. Usually fixes all problems. Always use High Temperature Caps. Try this and see if it helps. All too often it is these Electro's.. GL.
Posted on Jul 24, 2007
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
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