panasonic tx28ps12(euro9l)intermittent start up

[ernie]

i have this tv to mend when it comes on it will run ok no problem but the problem is getting it on if i keep switching it on and of eventually it comes on then it will stay on untill i turn it of then when i turn it back on again it stays in st/by untill i mess about with the on/of again any help is appreciated