New
#11
Hi Fender
The problem seems unusual as most of us quite familiar with power option.
How about little manipulation? (as to prove it only)
While the power is unplugged, try to create your own power plan, on the option of "on batteries" and "plugged in" try to slide it to the maximum brightness (the screen will still fade) but when you hit [create] see if it changes.
Hope it helps.