T61 14.1 "- no display BACKLIGHT - when starting or in Windows"

There is no backlight screen in BIOS or in Windows.  I replaced the inverter CCFL, the ribbon cable from the screen and the display.

I can see that the screen is working, just no backlight.  The Fn-bright/dim control does nothing.
The led indicators built-in to the CCFL inverter all work normally

The small LED light at the top of the screen can be turned on and the

This means it is a failure of motherboard affecting circuits that send power to the backlight?  Is there anything else I should try before replacing the motherboard?  I can use an external monitor to make a few settings in the BIOS or run other diagnoses if I knew what to do.

It's a do this work yourself or a person known in your neighborhood might help.

Bridge not the fuse. There was a cause for the breakup of the fuse. If it fill you up and the cause is not corrected, you kill the jury.

On the top of the fuse, you will find the ampere value.

Tags: ThinkPad Notebooks

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