G40 Video noise and blank

Upon startup, myG40 shows the POST page, then I hear a high pitch noice briefly, and the display goes dark.
The external video connector does work, but the lcd screen stays dark.
I have a second machine that I can use for parts.
Can someone recommend what part they think may need replacing?

Welcome to the forum!
My initial guess would be that the inverter needs replacing.
Good luck.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

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G40 Video noise and blank

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