Question about Philips 190P6EB 19" LCD Monitor

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Philips 190S monitor - Urgent!

I've a Philips 190S lcd monitor that's got issues, and I need it fixed for a theatre show that opens in a week. So all help is greatly appreciated!
I use it with a 17" Macbook Pro.
The monitor turns on fine - I can see the shared wallpaper on the display. After a few seconds, the display goes black (but green power light is still on).
If I turn it off, then on again, the same thing happens - Display for a few seconds, then goes black.
I've tried - In the few seconds it allows - Changing refresh rate and screen resolution.
I've opened her up and there are no burnt out capacitors - Or anything else for that matter that's obviously wrong.
Any help would be greatly appreciated!
Thank you in advance

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The lcd has three parts the screen plate(windows)/the logic(vga)/the inverter(power plug). Parts that go are the backlight ccfl's, behind the plate, and parts of the inverter, ie capacitors, all three take a bit of power from the inverter. The self test check that all the lights are ok and the inverter is ok, else it switchs off, ie if 3/4 light work it will switch off(my own case), hence the on chech error then off, However sometime there are stages of on/off ie on/ but no screen display, if that is the case the following may be of help...if you put bright light at an angle close to lcd can you see a windows shadow, text icons etc, ie still logic power passing,then .... (from a.n. other) after two weeks searching I finally find doctor living stone http://www.aplusperfect.com/articles/lcd_capacitor_repair more fun with paulbtorrent
the takening the case bit off is like opening your wallet a second time after buying a new LCD, but you must! smallest two screw driver's flatheaded, practice using two pennies stuck together()with your finger after, one little () move and inch and {} again, with the case , it does not break, just need to lever open
[once open you realize they somehow put that old briefcase clip inside!] also note the bright light test to do first to see if can see a windows screen , and that capacitors are one for a number of things that a make a inverter work! there a transistors as well, given that however, to replace all the capacitors on my inverter, was 11 capacitors, cost me $11 (uk ebay) and already had the iron and solder. So only cost me me $11 to try and see but no luck , still fun and I still can see the screen for 2 sec' at a time plus I have a spare set of caps now in the event that the new
one do go burst! you have to laugh really, what next , a new on/off
button, as you work though the whole inverter !
mmmMMMMmmmMMMMmmmMMMMTim Berners-leeMMMMMmmmmMMMMMmmmmcome back all is not
wellMMMMMMMMMMnnnnnnweek later land sight mmmmmMMMMMMMMMmmmmgggggggg(from
another a.n other)Generally, if the screen went out quickly, it was the inverter. If it went out over a slow period of time (flickering etc..) I would bet it is the lamp.replaceing the lamp should be pretty challenging. as that requires complete breakdown of your LCD, extraction of your dead lamp, and soldering in your new lamp... but I would like to say that I it did this after realizing it's 2 x kitchen strips inside [========] with wires that can connect back to the inverter with out any desoldering(ie kit assembly/dis) with the outter case remove (glass plate safe away) I could reconnect and see that 3/4 were working (i!i hardcard ) cause the inverter to switch off after a secound ! order bult and replace and going
to cheap and see if I can get away with fitting a 15" in my 19' as it a 1/3 of the price ! the market as drop out there, hope the inverter does not miss the length, or the screen out put.

Posted on Feb 08, 2010

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The capacitors may look fine without any sign of bulging top or bottom seal bulging but they can have high ESR (Equivalent Series Resistance), you cap meter to verify that ESR. The problem can be one or maore lamps are bad, you will need a set of spare lamps to find out if it is the inverter is bad or the lamps are bad. I have spare lamps for testing and cap tester with ESR function. The only thing you can do without all those tools is to check and see if the 12vdc (for the inverter cirsuits) goes away when the screen goes black. You can look here at example of failed monitors, test lamps, bad lamps, tools, etc. here: http://s807.photobucket.com/home/budm/allalbums

Notes: the inverter circuits will go into shut down mode if it is drawing too much current or if the lamps fail to stay conducting after the fire up sequence during start up if the lamps.

Posted on Jan 30, 2010

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