The remote will not turn the tv on, the batterys are fine. But when i turn the tv off at the mains the on again the remote works. I have to do this every time I want the tv on

Try unplugging the TV from the power source for several seconds. Also, pour new batteries in your remote.

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician

Take the remote control aparts,take some Q tips dips it in with some rubbing alchahol.Clean the remote control PCB board,putting it back together again,wait like 20 mins.Put in new batteries.The remote now should work again.If not it garbage,because it CPU chip is dead.Try website like Remotes.com to buy an exact remote to ur original remote.

defective IR sensor or main board

Tries unplug,replug the tv an hour later might work.But this a temp.fix,must replaced the backlight video board sooner or later.

try changing the batterys. If its a universal remote reprogram it again.

there is a easier way to check your remote.
Open your radio on AM frequencies, you don't need to be tuned just noise is perfect, then bring your remote near the antenna and press some button. You will ear the frequency in your radio. If it works this way but not on the TV make sure to press the TV button before using it (if the remote is universal).

My JVC 35 " AV 35750 toggled on/off non-stop too.

Fix for me: Unplug TV. Trace cables from on/off switch to main circuit board. I unplugged the cable at that point to eliminate the the on/off button and remote control sensor. Applied power to the TV and my TV stopped cycling on/off so I figured the problem was probably not on the main circuit board but with the push button/ remote control sensor board. I again removed power from the TV and plugged the cable back in to the main circuit board. I then applied power back to my TV to verify my symptom, but when I did this, the TV worked fine again.

Many times resetting circuit board connectors will clear electrical problems.

Sounds to me like a problem in the tv, not the remote. A short maybe, or a bad connection somewhere.

You can also try to take out the batteries and push all of the buttons with the batteries out of the remote. Then put the batteries back in and push the power button on the remote. If this doesnt work press the two TV buttons at the same time and the remote should be fine.