Changed batterys now it does not work

Sounds like remote control fault. Intensity of infra-red emission from the remote control is weak. Change the remote control or replace the infra-red LED inside it. Contact any service technician.
http://electronicshelponline.blogspot.com/

Instructions

1. • 1Remove the battery cover and insert new batteries into the remote. Press the "Power" button on the television to turn it on.
   • 2 Press the "PRM" button that is in the lower left corner of the remote control. You should see the signal indicator light come on.
     
   • 3 Click the DTA800 TV Codes link in the resource section to view a list of program codes for the converter box. Enter the 3-digit code for your television by pressing the number keys on the keypad. Press the "OK" button when finished. You should see the indicator light turn off.
     
   • 4 Point the remote at the television and press the volume keys on the remote control. If the volume for the television changes, the remote has been programmed successfully.
     
   • 5 Enter another 3-digit code for your television if the first code fails to program the remote
     
   • CODES : Emerson
     • The RCA Universal Remote has 17 different codes for Emerson televisions. These codes are 011, 026, 027, 028, 029, 030, 031, 032, 037, 042, 053, 064 065, 067, 075, 076 and 079. There are 18 different Emerson VCR codes. These codes are 008, 009, 010, 013, 015, 020, 023, 027, 034, 041, 042, 047, 057, 062, 065, 067, 068 and 070. There are no codes for Emerson cable boxes.
     
     
     Hope this helps. =)

try to change the batteries in it, if not works, try to take it apart, and find where is the break in the circuit.

replace the power supply board inside tv

go to remote manufacturers website click support you can download manual

service data

Emerson codes: 10154, 10236, 10463, 10180, 1o178, 10171, 10019, 10177, 10623, 10179

well if you change the channel to the highest it goes some TV can be changed to a/v mode

or the lowerest number under 2 sometime a/v might be there

remote stop working due to batteries or drop remote, might have to be replaced either abtteries or whole remote.

I’m happy to help further over the phone at https://www.6ya.com/expert/david_92c86cbc79e9b552

ok your problem is so simple,just clean the circuit board of your remote control.unscrew the remote control,get the circuit,then use a cotton with alcohol,then scrub,that's it......