I have a plasma screen and a official remote, it was working no problem till one day It didnt and opened the battery cover to see the batterys had both leaked, why this happened I dont know but wiped the contacts gently with a mildly damp cloth.
Left it a few days and still nothing so placed it on my radiator for a few hours and it worked but a few hours later the volume control didnt work.I left it for 2 days again and then tried putting it on the radiator for a bit again and volume control worked again(as well as every other button) then stopped working a few hours later.
I placed it on the radiator again and it worked for a short period.
Why is it that only the volume control button is affected?(that I know of) and why heating it sorts it temporarily.