1800FP green LED is on, screen is black

SCREEN DAY.
BUT NO PHOTO POSTED, worth 1000 words each,
can be lots of things ,
bad power supply, something shorted. caps but in backwards.
+ to + and - to - works only. or the short. every time.
there is no schematic,
leaving what?, guessing ? and buying used parts on ebay
expensive to do that.
i presume the OSD button is dead ,right?

the power button tells you its a hard failure, it did.

The L19xxxx has CCFL back lamps, most did.
so seems they work ok , to see color takes that working.
but power is first ,that mean not just 5v.

red- +5v
yellow- +12v
orange - +3.3
black- 0v
blue- -12v
white - -5v
green - ps-on(+5v)
gray- power good(+5v)
purple- stand by (+5v)
disconnect smps from motherboard give the power to smps and short green and black wires and measure the above voltages

In ATX PC power supplies, here is the wiring scheme:

Green: PS-ON (+5V)
Gray: PWR OK (+5V)
Purple: +5VSB
Blue: -12V
White: -5V
Orange: +3.3V
Red: +5V
Yellow: +12V
Black: Ground (AKA Common)

Use a paper clip to connect the GREEN wire and a BLACK wire. There should be a black one right next to the green. This is how I test PSUs before and after I repair them. Now it should be running, assuming there are no internal problems.

You can also connect the GRAY to ground with an LED. Not necessary, but I like to do it ;)

Pink - red input - pin 1 green - green input - pin 2 blue - blue input - pin 3 ground shield wire - pin 6,7,8 and 10 black - ddc 5v - pin 9 violet - screen raster - pin 11 white - data or sda - pin 12 orange - clock or scl - pin 15 yellow - vertical signal - pin 14 clear - horizontal signal - pin 13

power control chip of the VGA input screen is not controling the input settings

disconnect the signal cable from the computer. if it shows color bars, it means your monitor is ok and your video card is faulty. if it still does the same thing. you need to reseat the video card if its not integrated.

hope this helps.

Yes this is a good list of the voltages to be expected from a newer power supply on just the main header

check if your signal cable is properly connected to your system unit and make sure that non of the pins of your signal cable is broken.if any of the pins are broken,try and change the whole signal cable and re-connect it again
after following the above instruction,reboot your computer
thank you for contacting as with your problems,you are always welcomed

The power supply has most likely gone out. Check for 12v and 5v output and also the solder arround d903 and d907. The site www.lcdrepair.us sells the part as well as a repair kit and has instructions.

Its probably the inverter that lights up the screen that went bad.I have replaced inverter before with much sucess. If you feel comfortable opening the unit up I found one on ebay. Here is the link.

http://cgi.ebay.com/1800FP-LM181E06-FPD1830-18-LCD-Inverter-KUBNKM045A_W0QQitemZ300179625342QQihZ020QQcategoryZ74936QQssPageNameZWDVWQQrdZ1QQcmdZViewItem