noisy psu 42lg7000za

[efwiofoi]

I have a lg 42lg7000za with a noisy psu. the tv works most of the time but sometimes the standby light flashes and it wont come on.

i've uploaded a video of the noise it makes.


http://www.youtube.com/watch?v=m-jTL...ature=youtu.be

i can't see any obvious problems. I'm inclined to buy a new PSU becaue they are cheap but any idea what the problem is with this one?

thanks