After change a LCD, the screen of T43 is still dark, is the problem of board?

Hi,
    The LCD of my T43 is dark two weeks ago.
    I have change a reverter and a backlight, both of them doesn't work. I also purchase a used LCD assembly to replace mine, it is still dark. So I suscept it is the problem of mainboard.
    Have any body met similar problem? How can I deal with it?
Thanks.
Wei

Welcome to the forum!
What's the 7-character model number of your T43? Furthermore, what's the FRU of the LCD you have used?
Good luck and let us know.
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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After change a LCD, the screen of T43 is still dark, is the problem of board?

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