Question about BenQ FP91G+ 19" LCD Monitor

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No Signal Detected

My daughter unplugged the monitor cable to use with her laptop and the TV. Now when it is reconnected and the computer turned on the computer boots and windows starts to load. Then I get themesage 'No Signal Detected' and the screen goes blank. this happens before windows has finished loading. Windows continues to load because I hear the windows tune after a short while, but the screen remains blank. Can anyone help. Duncan

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Here is an easier and safer way to straighten your connector pins if you find any that are bent. Take a mechanical pencil without lead (.5 works ok but .7 may be easier to use) and ground it by touching it to your power supply. Then work the CPU pin slowly into the pencil and slowly bend the pin up. If you?re patient and careful you can usually straighten out any pins that have been bent. If any of the pins are broken don?t toss the monitor, its a relatively quick and inexpensive fix for a local computer repair shop. Good luck and let us know what the outcome is.

Posted on Jul 15, 2007

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Is this on a notebook or on your regular PC?The answer will determine what the solution is. You can first check to see if the little pins on the plug are all straight and none are bent or broken. If one of he pins is bent then you can try gently straighten it (unplug the monitor from the wall first) If any of the pins are broken then either the cable needs to be replaced or the monior has to be replaced.

Posted on Jul 14, 2007


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Whats the problem with no picture on the monitor but the cpu is working

Can you observe any LED lights on the monitor panel when you try to turn it on. If no then check your power cables. If you can see the LED lights but screen does not show try to unplug the VGA/HDMI cable and clean it by blowing air through the plug and then reconnect it. Also try to turn on the monitor without connecting it to the monitor as this will verify if the monitor is OK because if it is it should display a message to check the input signal or no input signal is detected. If it does and you are still not having a display then the problem is probably in your CPU and more specifically in the VGA card.

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What kind of wire do I need to connect my samsung laptop to panasonic viera hd 3d plasma tv?

Most TVs will have HDMI and RCA component and composite jacks. Some TVs will also have a VGA port. Your laptop will have a VGA port. (If the laptop is fairly new, it may also have an HDMI port.)

Not all TVs will support an HDMI signal from a computer, so the VGA signal is often better. However, that limits you to SD (anything with HDCP will fail.)

Very few TVs ship with the HDMI or component cables. However, there are some vendors who do package the HDMI cable with their TV. Without knowing which exact model of TV and laptop, I can only make a few suggestions. I know that the TCP42ST30 (Plasma 42") doesn't have a VGA port.

Look at your laptop for any external monitor port. VGA ports are generally blue female ports with 15 holes (D-Sub). If your TV has a matching VGA port, get a standard VGA monitor cable.

If you have the VGA port on the laptop but not on the TV, you can try a converting from VGA to HDMI. (You may need a DVI to VGA adapter and either a DVI to HDMI cable or a DVI to HDMI adapter.) Note: this gives an analog signal (RGB format) to the TV. You'll also need to make sure that your VGA port is active (in the BIOS for some computers) and then set your computer to send the signal to the external monitor. It is best to turn off both the computer and the TV before connecting the two. Then turn on the TV and set it to the correct input before turning on the computer. (In Windows 7, I set the video signal for the external monitor by right clicking on the desktop and selecting Graphics Properties. Set the signal to the external monitor and click Apply. Then click OK (in the external monitor's screen).)

If this doesn't work, you need a VGA to component video converter. (Not a VGA to component video cable - those are for projectors that read the RGB signal.) See .

Some laptops come with an HDMI, mini-HDMI or a DisplayPort option. For the latter two, you will need the appropriate cable with that end and the HDMI connector on the other. Then connect the TV and the computer as described above. (Note: my TVs accept a computer signal at the HDMI port labeled HDMI/DVI. However, you need to make sure that your TV understands this signal. It isn't the same format as that from a set-top box. My laptop has VGA and HDMI out; the desktops have VGA, DVI and HDMI (on one).)

If you add a comment with the model of your TV and laptop, I'll be glad to give you more specific options to connect the TV and the computer.

I hope this helps.

Cindy Wells
(A DVI port is a digital video out option with ~21 pins and is usually white.)

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1 Answer

I want to use my television as a computer screen. How do I switch the television to proper mode?

Look for a button on the remote or the TV itself labeled Source or Input. This should let you change the input between TV, AV, HDMI (on some TVs), and PC. Just press the button repeatedly or use the up/down arrows.

Before setting the input to PC (VGA), turn off the TV and the computer. Then connect the VGA cable (M-M) and the audio cable (a 3.5 mm M/M cable, if you plan to use the TV speakers) between the two units. Next turn on the TV and set the input to VGA. Then turn on the computer. (This is if you are using the VGA or D Sub 15 connection.) For a desktop, if you do not have another monitor connected, the TV should automatically be detected and the resolution set with any Windows OS (XP and later). However, you may need to reset the resolution and the refresh rate. For Windows 7, right click on the display and choose Screen Resolution.

For a laptop, you may need to enable the video port in the BIOS. Accessing this depends on the manufacturer of the computer motherboard. (Often Esc, F1 or F2 is the key to press after turning on the computer but before the OS loads. This can be tricky to time correctly.)

With a laptop or a desktop with another monitor attached, you will need to tell the computer how to deal with the multiple monitors. (Extend, monitor 1 only (or laptop internal monitor), monitor 2 only (external monitor), or dual display.) For my HP laptop with Win7, I choose Graphics Properties instead of Screen Resolution. There may be a keyboard Fn shortcut to access this.

Some TVs will accept a PC signal on the HDMI port (directly from an HDMI port on the computer or via a DVI to HDMI cable). Not all TVs do this. (Without the model for your TV, I can't confirm if this will work. If it doesn't, it is because of the differences between the PC output signal and that of set top boxes (cable or blu-ray players).

I hope this helps.

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1 Answer

TV set to vga source - laptop connected via hdmi cable to vga socket - TV says no signal - how do I activate connection?

Hi there,
Please make sure that the connection is detected by your computer..go to the settings of your computer (where you adjust the screen resolution) and check if a 2nd monitor is detected (do this first before assigning the TV as your primary monitor just to ensure the connection).
If it's detected make sure that the resolution that you set is supported by the TV.
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I am attempting to connect a PC and/or a Playstation 3 via an HDMI cable and my Samsung Plasma Model HP-5033 will not read the signal between the PC and television. It reads a "No Signal Detected" message...

Adjust the computer resolution to 800-600 and set the lowest bit rate, ie not 32bit. 24bit or 16bit will be fine.
To do this right click on the screen and choose properties, click on settings and you will see the slider bar the resolution and the drop down menu for the bit rate.
The reason you have to do this is because even though its a tv it works on a lower resolution than a computer monitor and is unable to show higher res.

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My samsung 940N acts like a florescent tube, tries to start and doesn't

Use the self test feature.. follow the steps..

1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer.
3. Turn on the monitor.
If the monitor is functioning properly, you will see a box in the illustration below.
This box appears during normal operation if the video cable becomes disconnected or
4. Turn off your monitor and reconnect the video cable; then turn on both your computer and the
If your monitor screen remains blank after using the previous procedure, check your video
controller and computer system; your monitor is functioning properly.


The Power supply inside the monitor can be hazardous and donot open the monitor while power on.

Donot work with the monitor when it is open and the power supply is on.

If there is something wrong with the input signal, a message appears on the screen or the
screen goes blank although the power indicator LED is still on. The message may indicate
that the monitor is out of scan range or that you need to check the signal cable.

Feb 13, 2010 | Samsung SyncMaster 940N 19 inch LCD...

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Monitor says no input signal going in sleep mode


Feb 08, 2010 | HP vs15 15"LCD Flat Panel Monitor

2 Answers

No picture - blinking blue light. My daughter was

There are a few things you can check. First, try to see if the monitor cables are firmly connected on both sides (computer and monitor) no need to remove any cable for now just check the monitor cables (ends should be blue or white on both sides) Then check if you got an imput button on your screen (like all TV and some monitors now has) This input gives you the choice between a few possible connections and it may be on the wrong one. Just cycle trough the input modes and I think you will have your image back. If Still, you dont see anything, try a different monitor or try to connect your monitor on a different PC/laptop. In fact blinking blue could be there because the monitor is awaiting a signal on the input it's listening. At worst it could be because your video chip/card dont send a signal to your monitor, could happen, but imo it's probably not the case.

Jun 08, 2009 | Gateway 1532121 Monitor

1 Answer

My monitor will not come on when power is applied automatically. the monitor does not come up when my system comes on. I just replaced the monitor which i swapped same exact monitor, but this one will not...

Please work through the following steps to troubleshoot your no power problem with a ViewSonic Monitor:

Troubleshooting Power Issues:
  • Disconnect and securely reconnect the Power Cable. Then retry the Power Switch.
  • Try using another Power Cable. Most Computers use a similar power cable.
  • Check the power source using another electrical device (like a radio) to make sure the power source is supplying sufficient voltage.
  • If the monitor is plugged into a power strip or extension cord, try connecting to a dedicated wall outlet.
  • If you are using a Thinpanel series LCD (e.g. VP191b, VP201b, etc) check the power switch next to the AC input port on the monitor and make sure it is ON.
  • If you are using an LCD TV, note that some models have a main power switch on the back side – confirm it is on the ON position.
  • If using a remote control, make sure the battery is properly installed.
If the LED is on, but there is no video, use the following links:
  • LCD or CRT monitors : Orange/Amber LED - monitor is receiving power, but no video signal received:
    • Verify that the computer is turned on. You can test this by pressing the Num Lock key on your keyboard once or twice. If the Num Lock light does not turn on/off, then the computer is not working.
    • Make sure the video cable supplied with the panel is tightly secured to the video card in the computer.
    • Check video cable to ensure all pins are straight. If the cable is detachable, try a different video cable
    • If your monitor is connected to a Laptop or Notebook computer, the video output on your laptop may be disabled. Consult your laptop’s user manual or contact the laptop manufacturer for assistance on enabling this feature.
    • Connect the monitor to a different computer system (if available) to see if the issue is with the video card or the monitor. Check the user's guide to see if any special conversion connector or adapter is required for proper signal continuity between the video card and the LCD.
    Red LED:
    • If the LED is Red and the monitor has no video (no picture), please try the display with another system.
    Green LED - A signal is detected from the video source:
    • Check the video cable to verify that the cable connection is good and the pins are not bent or broken.
  • LCD TVs
If you have tried the above steps and the problem persists, please Contact Technical Support at ViewSonic.

I hope this will allow you to resolve this issue. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

Mar 27, 2009 | ViewSonic E70f 17" CRT Monitor

5 Answers

Check signal message when data cable unplugged. blank screen when data cable plugged

This problem is most likely to be caused by a bent or broken pin on the CRT video cable at the VGA connector, OR, this could also be caused by a damaged VGA connector on the back of the laptop. If neither VGA connector is at fault, the problem could be caused a damaged (kinked) CRT data cable, or internal damage to the VGA connector on the back of the laptop, though I suspect the problem is more likely to be external, and you probably won't have to disassemble the laptop to locate the culprit...

Feb 05, 2007 | IBM E74 17" CRT Monitor

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