My TV is Stuck in Standby?!!!?

I had stopped using my TV for 2 weeks and I disconnected the power adapter from it
When i turned it on again there was no picture but i could here a quiet fuzzing sound coming from the speakers
So i investigated the problem and it seems the the AC Adapter isn't supplying enough power for the tv and so it has gone into some sort of safety mode, also the AC Adapter is making a wierd low pitch noise

Could this be because i left it off for so long?
Also it wouldn't make much sense if the AC adapter was fried

Can anyone help me fix this problem?
My Tv is a [Sanyo] CE17LC4W-B

AC ADAPTER Details:

P/N: 1AV4U11B27700
Model: ADP-80MB A
INPUT: 100-240~2A 50-60Hz
OUTPUT: 19V----4.21A
 
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