Question about Dell UltraSharp 1800FP 18.1" LCD Flat Panel Monitor

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Dell 1800FP I need to know how to test for 5v and 12v of Power Supply for Dell 1800FP Do I touch ground w/ muti meter lead and then touch each output pin that goes to ribon cable? I am getting zero voltage. Even going across two pins at the same time, I am getting zero. I think the supply is bad but I am not sure I am testing it correctly. Any advice would be appreciated. Tripp English

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  • 138 Answers

What's wrong with your monitor?

Posted on Feb 10, 2008

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Posted on Jan 02, 2017

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1 Answer

Video on 1800FP flashes on and off.


You need to check the output voltage of the power supply module to see if the 12vdc output is swtiching on and off, it can be power supply failure or it is sensing short circuits, it can also be the inverter board.
http://www.lcdrepair.us/1800fp-power.html

http://www.lcdrepair.us/1800inverterKUBNKM045A.html

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

May 12, 2010 | Dell UltraSharp 1800FP 18.1" LCD Flat...

1 Answer

How can one determine what polarity is needed for an appliance that hasn't indication on it?


Since your monitor requires 4-pin dc connector: http://insidecomputer.stores.yahoo.net/ac-power-adapter-4pin-for-hp-lcd-l1510-l1520-41510152015201720175060.html
You may want to buy a new one, or if you really want to know which pins are positive and negative, you will need and Ohm meter and open up the monitor, attach on lead of the meter to a fuse on the main board (it will be labeled with Fxx) and another lead of the meter to one of the 4-pin power input at a time, two of them should indicate less than one Ohm, once you find that, the next to do is to trace out the copper trace of the PCB, it should be connected to the POSITIVE lead of the Electrolytic capacitor (usual value will be 220~470uF). Next, connect one of the meter lead to the metal part of the chassis, then measure the reistance of the other two pins of the power connector, it should be leaas than one Ohm. If you get all this reading then the monitor is using Negative ground system for the electronics.
Notes; most monitors that use 4-pin connector with single power supply (it will show spec. something like12V 5A), then two pin will be tied together (12v is fed to two pins, Ground is fed to two pins). Hope this help.

Jan 06, 2010 | HP L1510 (White) 15 in. Flat Panel LCD...

1 Answer

There screen will not switch on and the power light is flashing


This was the same symptom on a Dell 19" LCD monitor I got and after disassembling it found a
shorted transient absorber diode (ZD15) on the power supply board. This diode is a protection diode between the 5V and 12V output. You do not need it
to be in the board but if you want to keep the same
protection on the board I suggest you order a
replacement from Digikey.com or Mouser.com.
You will need to know how to separate the front bezel from the rear casing to get to the power supply board. I have a picture of the power supply board and the bad part is at the bottom left of the board with the designator ZD15.


4ee55c8.jpg

Sep 28, 2009 | Dell E173FP 17" LCD Monitor

2 Answers

Dell 1800fp


Find and replace the ICE2AS01 on your power supply

Apr 28, 2009 | Dell UltraSharp 1800FP 18.1" LCD Flat...

1 Answer

1800FP green LED is on, screen is black


power pack has issues could be a chip on the power pack or some capacitors on the power pack. the power pack supplies power to the inverter.


Feb 20, 2009 | Dell UltraSharp 1800FP 18.1" LCD Flat...

1 Answer

Dell 1800FP, no signal found (analog). Green LED on, get message


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

Jan 26, 2009 | Dell UltraSharp 1800FP 18.1" LCD Flat...

1 Answer

Power connection pinout


Here is a pin connection specification for the ac power supply (dual voltage adaptor)
>socket/plug for a Compaq TFT450 LCD Monitor that she
>supplied (edited for further clarity).
>
>The pins of the male connector (a PS2 mouse type connector) should be connected like this:
>
>
>
> 1 2
>
> 3 I 4
>
> 5 ^ 6
>
>
>
> GND GND
>
> 5V I 12V
>
> 5V ^ 12V
>
>
>
>For clarification - the male will be the end of your cable, and not the socket on the monitor.
>The I is the central polarising bar of the connector, and the ^ is the notch.

Jun 16, 2008 | Compaq TFT450 14" LCD Monitor

1 Answer

Dell moniter


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.

May 24, 2008 | Dell UltraSharp 1800FP 18.1" LCD Flat...

6 Answers

Dell 1800FP Dark, No Power but power supply seems fine. Help!


I just repaired 3 1800FP's - all dead, no lights.
Firstly a dead 2AS01 is 95% of the problem, because some fool designer left out the protective zener diode - cheapness.
Mouser Electronics does not have this part, but lists it at 37 cents in lots of 2500, and gettable at $2.66 somewhere else.
You must also replace the two small value electrolytics near this IC, as some had an ESR of 40 where <0.5 is where it should be.
I suppose as the electro's dry out, the spikes can zap the IC. The quacks on ebay flogging 2sa01's alone, probably hope to sell you another one down the track (at a fat markup).

There are 2 'Sam Young 2200uf' electros that really should be replaced, with ESR or 2-30 ! Ideally replace ALL electros, as the others will be off - but those 4 as a minimum and using a jewelers loupe, resolder other joints on the transformer and anything that looks more dull silverish, than the rest. A 1 inch used and worn paint scraper will get the case open easy.

DANGER, CAUTION : Finally when refitting the inverter board, ensure the steel tab is over the TOP middle of the board facing away from the power socket (SO YOU CAN SEE IT) . The board sides in flat. It is possible to scew the board down with a slight bend, with the tab pressing over the pcb tracks - very , very bad!

Now all I need is for some kind soul to improve the fix by stating what the value of the missing zener should be.

PS. Just because the caps are not bulging does not mean they should be OK. Most wrecked 10 year old power supplies have better ESR's, so the electronics must be hot under the cover.
I have seen bulging caps with a GOOD ESR, and non bulging ones with an ESR of 47.

Canberra

May 21, 2007 | Dell UltraSharp 1800FP 18.1" LCD Flat...

1 Answer

Intermittent power on problem, monitor now completely dead


See other post regarding IC901 Please feel free to RATE me if it helps

Aug 27, 2006 | Dell UltraSharp 1800FP 18.1" LCD Flat...

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