Question about NEC LCD4000 40 in. HD-Ready Television

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Red Attention sign on screen

I have a TV that is setup in the operating room and we can change to different areas and view Xrays, heart caths and ECHOS from other areas. The problem is when the cath lab is pulled up live it gives me a red sign that says Attention The frequency signal is out of range. Please change the signal timing. Just below the words there is H: 77kHz V: 72Hz How do I change that timing?

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  • 87 Answers

Try this. The signal timing of the monitor is picky in the fact that it must have 60hz. Try changing the source of whatever is feeding that monitor to output 60hz signal. That should fix your problem.

Posted on Oct 22, 2009

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Posted on Jan 02, 2017

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I've just set up an echo dot in another room but it's taken control of my sitting room lihgts from my echo plus which now say sorry, i didn't see sitting room lights.


try renaming the room of your lights and make sure both echos are synced up to one account otherwise it may make both of them confused on how to control the lighting in your home

Dec 16, 2017 | Echo Computers & Internet

1 Answer

I cant view my sky channel on my tv


So you want to view your sky TV in a different room?
You can achieve this a number of ways.

Purchase the multi-room package from Sky TV. This will give you fully independent TV reception in each room. (Basically two sky boxes)

Purchase a TV sender which will wirelessly duplicate the output on the TV to another device.

Connect your Sky box to a second TV with high-quality co-axial aerial cable connected to the RF2 output on the back of the Sky box.

Mar 13, 2015 | Televison & Video

1 Answer

Picture settings..? What are the best calibration


You can't use someone else's numbers, even for the same set, and expect them to be perfect. The picture settings are governed by the viewing conditions in your TV room.

Settings such as Brightness can only be set correctly in the room where you are viewing. Brightness affects where you might then set gamma, and contrast, and colour. So just one setting has a lot of impact on several other areas of the picture.

Putting in someone else's numbers will make the picture look different. But that's not the same as the "best" calibration for your TV.

If you want to do a good set-up without spending any money, have a look at your DVDs and Blu-rays for those titles with the THX Optimizer.

Sep 13, 2014 | Televison & Video

1 Answer

Remote not working as i moved tv into another room


If the remote control you've bought is a universal remote control, you have to set it with your TV, by TVs setup codes. The setup code list will be attached to the new remote controls' packing. If you wish to get more details, check the sites linked here. Set-up code list, and Set-up procedure to many popular brand remote controls are given.
http://electrohelponline.blogspot.com/ http://remotesearch.blogspot.com/ Selecting the view option, either to Mosaic / Timeslide, can be selected by the drop-down list, by the top left of the display window, will make surf easy

Nov 06, 2013 | Grundig GU22DVDPX 22 in. LCD TV

1 Answer

How do I setup 2 tv,s on a single view dsd 1131 decoder, 1 tv and decoder upstairs an 1 tv downstairs. The dish is already installed and can rust very easily for the area.


very simple ,, the tv next to the decoder must be conected using a rca cable and then run normal tv cable (RF out ) to the other room

Apr 04, 2013 | Televison & Video

1 Answer

No remote


Direct Code Entry
  1. Press and hold the SETUP button until the red indicator stays on, then release the SETUP button.
  2. Press and release the desired Mode button (TV, VCR, etc.). The red indicator blinks, then stays lit.
  3. Enter the 4 digit code from the code tables. Note: after a valid code entry, the red indicator turns off. For an invalid code, the red indicator flashes.
  4. With your device on, press CHANNEL UP. If the device responds, no further programming is required. Note: If some buttons do not operate your device, try one of the other codes for your brand.

Visit the site named 'Electro-help' for more details. Check this link and select the site named above. View it in 'Flip card' option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 750 posts to different brand TVs now.

Sep 15, 2012 | Haier HTF24R21 24" TV

1 Answer

Only get zig zag lines in viewing window no picture


1. try to setup a different setting in setup menu where are you can setup the NTSC or PAL sistem2. change the driver
I think the driver change will help.

Feb 01, 2011 | KWorld PC to TV (0872880887527) Video...

1 Answer

Lost remote


On the front of the receiver press and hold the mode button, when you have it in single mode choose system setup and then shared view.use the arrow keys to highlight "enable" on the shared view and then "done" to save changes, you can then use the one remote to watch the same thing on both TV's, until you either find or replace the problem remote.

May 13, 2009 | DISH Network IR Remote Control

1 Answer

Projection TV when turned on picture is dark can view slight images until dinning room light is turned on


Try hooking the TV to a different outlet fed by a different breaker. Does the problem go away? If so, the culprit may be a wiring problem in your house that is causing the TV not to get enough power unless the dining room light is on.If in doubt, consult an electrician to make sure both the dining room light and TV outlet circuits are working properly.

Mar 06, 2008 | Mitsubishi WS-55613 55" Rear Projection...

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