My lenovo Y550 is connected with lcd through HDMI cable I m pressing Fun key + f3 but still not getting display

Hi

Have you install your graphic driver properly?

1. First you must check if your graphic driver to the latest update.
2. instead of using fn + f3 try using windows + P
3. check your vga cable if not broken try other vga cable or use hdmi cable.

HDMI is the best method as VGA is low density video. You may have to set up the laptop to send data output to the HDMI/VGA port (Out to the TV). Your manual should spell out the procedures to change from Computer Internal Video to Video OUT.

Look for a button that says "LCD/CRT"
Press this key combo:
fn+[whatever key the text above is on]

Yes.

1) Laptop OFF, monitor OFF.
Connect a VGA monitor to the VGA port, on the back of the laptop.

The VGA port is on the right side, as you view the back of the laptop.
This is a basic example of a VGA cable, and a VGA port, (Connector),

http://en.wikipedia.org/wiki/VGA_connector

NOTE* Color does Not matter.

You can use a CRT monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

Turn the monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default the display should show on the external VGA monitor.

IF not;
Press, and hold down on the Fn key, and at the same time tap once on the F3 key.

No?
There are at least 3 display options;

1) Internal monitor of laptop ONLY

2) Internal monitor of laptop AND external VGA monitor

3) External VGA monitor ONLY

Hold the Fn key down, and tap again on the F3 key.

(The Fn key is down at the bottom LEFT corner of the Keyboard.
The F3 key is at the top of the Keyboard.
The F3 key is the Display Toggle-Over key )

Need more information post in a Comment.

Regards,
joecoolvette

check the resolution on your laptop, make sure it is set properly. also try and press the function key that controls the display output.

If you need further help, reach me via phone at https://www.6ya.com/expert/joel_63c670a84e9f6a97

Your Lenovo laptop can be hooked up your TV if you have a model that is capable of TV output. Newer models with HDMI ports can easily connect to newer TVs that have HDMI input jacks. For older laptops or TVs, you will need other adapters or cables. The most common of these is an S-video jack, which has a small round connector with several pins arranged in a circle. For S-video connections, you will need to hook up the audio from your laptop to your TV separately.

Things You'll Need

HDMI cable

USB-to-HDMI adapter

OR

S-video cable

Audio cables

HDMI Connection

Turn on your Lenovo laptop and HDMI-enabled TV.

Connect one end of your HDMI cable to the HDMI port on your laptop. Lenovo's IdeaPad series has these ports. If you have a ThinkPad or other Lenovo model, connect a USB-to-HDMI adapter to your HDMI cable, then plug the USB end of the adapter into any USB port.

Press the "FN" and "F7" keys on your keyboard. This will switch the laptop's display to the TV. You can then use your TV screen as a monitor or use the laptop's DVD drive to watch movies on your TV.

S-Video Connection

Turn off your laptop and TV. Connect your S-video cable to the laptop on one end and the TV on the other.

Plug audio cables into your audio out jacks on the laptop. If you do not have stereo audio output, you can use the headphone/speaker jack. Add a splitter adapter to split the sound into stereo instead of mono (single speaker). Plug the other ends of the audio cables into your TV.

Turn on the laptop and let it boot up. Then turn on the TV. Right-click on your desktop screen, then select "Properties."

Click the "Settings" tab, the "Advanced" button, then "ATI displays" or "Display device" or the similarly worded option, depending on your system. It is not the "On screen displays" option in any version.

Click on the option that suits your system, such as "TV" or "LCD." Click "Apply," then "Yes" to confirm, if necessary. Click "OK" to exit. Your display should be visible on the TV screen. If not, try pressing "FN" and "F7" to toggle the display to the external screen.

from a cable box you must have the box in hdmi mode turn cable box off with tv on and press menu on cable box remotly scroll down and turn on HDMI

There is a symbol of Two monitors on F3 Or F4 button

1. Press Fn key and hold it
2. by holding Fn key press F3 key

Your monitor will start displaying

Hi
Connect the monitor, flat panel, or projector to the laptop's 15-pin video connection on the back of the computer as shown to the right. Once connected, your laptop may automatically switch to the new external display or you may be required to press a sequence of keys in order to switch from the laptop to the external display. For example, often either Fn + F3, Fn + F5, Fn + F8, or Fn + F9 is pressed to switch between alternate displays. So if your laptop was Fn + F3, pressing and holding both Fn and F3 at the same time would switch between displays. Often, the alternate key pressed in conjunction with the Fn key will be labeled as CRT/LCD and/or have a picture of a monitor on the key or close to the key. Unfortunately, the keys pressed to switch displays is dependent on the model and manufacturer of the laptop. If none of the above key sequences work, consult your laptop documentation or consult your laptop manufacturer.
Some laptops also have the ability to have the display on both the laptop and external display and/or one or the other at a single time. Laptops with this ability can switch between these modes by continuing to press the same function keys until in the mode the user wants.

Easy...first connect the hdmi cable between laptop and tv. Press and hold the 'fn' key on the laptop keyboard - bottom left corner. while holding the fn key, press and release the F4 key. This will toggle the laptop between its multiple display capabilities.

Press and holfn - press and release F4 until you get an image on the big screen.

Enjoy :)