Hi,
Did the darkened backlight issue ever get resolved?
I have the same problem and I've had no luck finding an answer anywhere online.
My amp is a Spider V 60. The amp works fine but the display is not illuminating when I switch it on so it's really hard to read.
If I connect my laptop via the usb I can get it to light using Spider V remote but surely there must be a way to have it light up when I turn the amp on?
Thanks in anticipation
UPDATE:
After fiddling about randomly I think I've finally fixed the issue!
All I did was switch the USB selection switch to iPhone/Android and it is now illuminating as it should!
Pity I didn't try this before I posted but I guess it might help someone else down the line.
Thanks folks :-)