If you don't know the PIN code, then unplug the TV for 24 hours.
Then, when you turn it on, within 5 seconds hold in the Volume - button on the TV at the same time as pushing the Number "7" on the remote handset. The TV should then come on in "unprotected mode" , and you can see and change the PIN code.
pete i switched off the tv yesterday evening so i have to wait 24 hours to do your advice.meanwhile may i ask you when i go to switch it back on again do i do it by the tv switch or switch on by the remote and within 5 seconds hold in the minus volume and keep pushing no 7 on the remote in and out until the unprotected mode comes on. do i only get one try at this and have to wait 24 hours again. john
pete it worked second time around when i switched on the tv button switch then held both the volumn down button on the tv set and the no. 7 button on the remote at the same time . it went on with a hazy nothing on it screen and i went to menu and continued. thank you pete .i will now rate you..johnd