Question about NEC MultiSync LCD1765 17" Flat Panel LCD Monitor

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I have a NEC lcd1765 monitor that is dead!

No power at all.Checked voltage going into main pcb 12Volts on both red wires

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Hi...there,
No power...usually caused by burnt out capacitors in the built-in power supply with inverter.

Posted on Dec 06, 2008

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Posted on Jan 02, 2017

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I HAVE A JENNAIR JS42CSDBDA FRIDGE THAT WENT DEAD NO POWER,NO LIGHTS CHECKED OUTLET AND FOUND POWER GOING TO FRIDGE BUT NOTHING. IT ACTS AS IF IT'S NOT EVEN PLUGGED IN.


No one turned off your power switch up above the refrigerator, I trust. So, either your power supply or your main PCB is blown. Check the fuse on the main PCB (up on top of your refrigerator in the compressor area). The fuse will be right next to that round, black piezo electric speaker on the main PCB board as shown here:


52f3d145-54c2-4885-b0b7-dceebc8d9c83.jpg
If that's not it, then check to see if your power supply board is supplying power by measuring the voltage on JP11 of the Main PCB. You should see 26 vdc between pin 3 (GND) and pin 1. And, you should see 12 vdc between pin 3 (GND) and pin 2.

If you don't get those voltages, then you might have a bad Power Supply Board. It looks like this:

73a3b2de-febc-4413-9ad4-529414e074c1.jpg
Also of note, your 120vac going into the Main PCB board comes in on JP8, pin 1 (WHT) and pin 5 (RED).

I don't know if you will be able to see the larger image of the schematic, or if Fixya will just give you a thumbnail, but I'll try to post it here, anyway:

b028f564-3f79-41e6-b61e-1de07345fc54.png

Well, good luck and let me know if you need any more assistance.

Oct 20, 2014 | Jenn-Air Refrigerators

2 Answers

NEC Multisync LCD1765: Screen flashes and then mintor turns off with message "No Signal"


Restart your computer.
As soon as it starts the start-up process, keep tapping the F8 key, repeatedly.
When you see the Windows "start-up" menu, select "start in safe mode".
Does your monitor work in this low-resolution (640-by-480 or 800-by-600) mode?
If so, then you had configured Windows to a too-high resolution that the NEC did not support.
Choose 1024-by-768, and click "Apply", to test that the NEC supports this mode.

Try connecting the NEC to some other computer, to see if the NEC itself is the problem.

Mar 28, 2011 | NEC MultiSync LCD1765 17" Flat Panel LCD...

1 Answer

NEC MultiSync LCD1765 won't power on


Look for bad caps with bulging top in the power supply first, post back what you see inside so we can guide you further, see example of failed monitors due to bad caps (after about 2 years): http://s807.photobucket.com/home/budm/allalbums

Feb 15, 2010 | NEC MultiSync LCD1765 17" Flat Panel LCD...

1 Answer

I have vertical red pinstripes when the background is white. The stripes are green on a black background. Could this be a monitor problem or the graphics card?


My monitor does it too, I'm guessing yours is a LCD? It does this when the bulbs start shorting out and aging due to an aged monitor, so certain colors will appear extremely grainy.

Oct 19, 2009 | NEC MultiSync LCD1765 17" Flat Panel LCD...

1 Answer

Monitor will not get out of sleep mode


Press F2 or Delete key or the key specified to get into BIOS. Go to power management and select S1 & S3 for Power management. Save > Restart. This should solve the problem

Jan 05, 2009 | NEC MultiSync LCD1765 17" Flat Panel LCD...

1 Answer

I would like to know how to troubleshoot a brand new Ultra LS600 power supply. I would like to go beyond hearing "it's dead" since I am getting power to the motherboard (via indicator light)m but the PSU...


You can start the PSU manually with a paper clip.
Remove the 20 pin connector from the motherboard, leave the four pin power connectors attached to your various drives (this will provide a load on the power supply when it start up (provided it is not faulty).
Look at the 20 pin connector with the connector facing you.and the locking clip to your left.
The fourth pin from the bottom LH corner should be a green colour wire and the next two wires (5th & 6th pin) should be black and next to the locking clip.
Straighten a paper clip and insert it into the 4th pin and into the 5th or 6th pin (ie connect these wires together). These wires connect to the front panel switch to turn on your computer. You are testing the power supply only and since it is not connected to the motherboard the computer won't start.
Now connect the power unit to the mains and switch on the mains, if the power supply is OK the PSU fan should spin up and your hard disk should also spin up. If nothing happens the the PSU is faulty.
You can test the +5volts and +12volts supply on a 4 pin power connector with a multimeter. The red wire is +5volts and the yellow wire is +12volts and the black wires are negative (ground). The voltage readings should be within 5% of these voltages.
There are other voltages to be checked +3volts, -5volts, & -12volts. but these are not as critical.

Dec 05, 2008 | Ultra Products Ultra LS600 Lifetime Series...

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