I just did it on one but it didn't fix it so I'm waiting on a replacement inverter. It's not too hard - just 4 screws that hold the lcd assembly onto the top of the case, then the backlight is just stuck under the lcd with 2 wires going to the inverter - you just have to pull the old one out and resolder the 2 wires.
edit:
got it working - the inverter needed replacing too - looking good now. Next is a replacement encoder - I'm trying a non-original one - I'll report back on how it works and the part number as I know replacements are impossible to find.
I'm going to be selling this pimped out 60ii if anyone's looking for one.