I have a Marantz SR 8001. The front display lights went completely out, but the blue lights over the selector knob, volume knob, and the HDMI blue light comes on. I was setting up a Logitech 1100 remote with the PS3 adapter and poof the lights went out. I grabbed the Marantz remote and hit the display button but nothing worked. I turned the receiver off and unplugged it and still no display. Any ideas?

Hello,
You have a nice piece of Stereo...I believe you have mistakenly selected the" display mode OFF" function..,Here is the info that you can reactivate it..
If you need a soft User Manual here is the link for it too..

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Hope this helps!
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" display mode OFF"

You can select the display mode for the front display of the SR7001.To select this mode, press the DISPLAY on the remote control or the front panel.When this button is pressed, the display mode is switched in the following sequence.Input Mode ? Surround Mode ? Auto display OFF ? Display OFF ? Normal Mode ? Input Mode Normal Mode: Displays the selected input function. If the function has been renamed using the Function Rename feature (see page 26), the renamed name appears on the display. Input Mode: Displays the input mode set via the Function Input Setup feature (see page 25). Surround Mode: Displays the status of the selected surround mode. Auto Display Off mode: The display is off. But, if you make a change to the unit such as the input or surround mode, the display will show that change, then go back to off after about 3 seconds. When changing the volume, it is not displayed. Display Off mode: The display is off completely. Note: • Only the DISP indicator will be illuminated on thefront display in display off condition
http://www.scribd.com/doc/53431794/Marantz-SR-8001-Owners-Manual