Red light flashes TV comes on the goes and stays off for a long period then returns for seconds before going off again.Could this be an Ir remote sensor issue?

Only if you have a source button on the tv itself. On many of the newer sets you have to have the remote to access your other inputs. Without the remote, nada. And forget universal remotes - they only provide for the most basic functions and video source is not one of them. And you get hosed on original remotes.

you have a power fault and it needs a tv engineer to fix it

lrsnihe

You were attempting to perform a power scan initially. The second procedure is manually attempting to address the remote to your TV. I will give you the procedures again so you can try one more time. Emerson TV is one brand we have a low percentage of success getting our remotes to work. If it still doesn't work, we could try replacing the remote.

TV code: 623, 667, 666, 233, 516, 537, 544, 642, 655, 699, 000, 999, 888, and 720.

Remotes: Basic (Television Only)

1. Turn the Television On.
2. Press and hold the clear TV button for six seconds until the LED flashes.
3. Enter the three-digit code using the buttons on the number pad.
4. Press #. Note: The LED will flash three times.
5. Test functionality with the TV.
6. Return to Step 2 if the remote is not able to turn the TV On/Off, change the volume and mute the television.

Remote Power Scan: Basic Remote (Television Only)

1. Turn the Television On.
2. Press and hold the clear TV button for six seconds until the LED flashes.
3. Press and release the red TV Power button.
4. Press and release the Up or Down Arrow on the remote until the television turns off once every second.
5. After the television turns off, press and release the # button.
6. Test functionality with the TV.
7. Return to Step 2 if the remote is not able to turn the TV On/Off, change the volume and mute the television.

The 5 blinks error code means that the lamp driver is faulty. How good are your electronics/soldering skills?

generally when you get a constant green light all is ok. these different lights indicate different problems within the tv. so the pattern of lights you mention suggests there is a fault of some kind (is there a troubleshooting section in your manual)? either way it needs to be looked at.

red light flashing on bottom of tv and no picture

To program your remote by entering a code from a manufacturer's list, follow these steps:

1. Turn on your TV.
2. Press and hold the CODE SEARCH button for at least 3 seconds until the red LED lights up and stays lit.
3. Press the TV button on the remote so that the LED blinks once and then remains solid red.
4. Enter the first set of 3-digit codes from the list. The LED will blink once every keypress. After the 3rd digit, the red LED will turn off indicating that the code was recognized for the device. If the code was not compatible, the LED will flash several times and you need to return to step 2 to try that code again or to try the next code in the list.
   
5. After the LED has turned off, aim the remote at the TV and press ON/OFF. If the device turns off, you have used the correct code and the remote was successfully programed. If the device does not power off, return to step 2 and try again with the next code in the list.

To have the remote try each TV code it knows one at a time, follow these steps:

1. Turn on your TV.
2. Press and hold the CODE SEARCH button for at least 3 seconds until the red LED lights up and stays lit.
3. Press the TV button on the remote so that the LED blinks once and then remains solid red.
4. Press the ON/OFF button slowly and repeatedly until the TV turns off. The LED will blink once each time you press the ON/OFF button.
   
5. Once the TV turns off, press the ENTER button to store the code and the LED will turn off.
   

I hope that helps.

Try unplugging for 36 hours. I had the same problem but with no sound and picture

Sounds like you  accidentally "set" the parental lock while you were sleeping.

Try this trick: (may or may not work)

aim the remote at the TV "IR sensor", hold down "display button" on the remote for 10 seconds to erase or clear the password.

"IF" this works go into the menu and "TURN OFF" parental control.

same frustrating symptoms on brand new 42inch here! tv just turns itself off sometimes without warning or if changing to certain channels. leaves red light flashing for a while then red light goes away. any attempts with remote gives flashing green liht on tv. manual power off and on restarts tv but auto off again. found while manual power on keep changing channel on remote till stable picture appears. then use remote to shut down tv - solid red light indicates standby mode. then use remote to turn on again... till next time it happens. but what is technical fault??