Hi,
Just bought a new display, so I took the time to tear down my old Lenovo to see what's causing the irritating whine/squeal/buzz that's been giving me headaches.
And it appears to be coming from all 3 transformers that can be found on the PSU board(find the attached pic). Not all at once but each at it's own time depending on the display state:
T1 when the AC is plugged (probably usb hub power)
T2 when I turn on the display (CCFL backlight)
T3 when the display goes to sleep (stand by/display controller)

As i've read in a lot of threads here...

Re: New Members - please post your introductions here

Cheers, My name's Konrad, I'm a sound engineer and changed many bad caps in my life but i found this great forum while trying to fix my CCFL display's transformer buzz and can't figure it out that's why i need some specialist's insight