I've been living with the purple banding / hazing since I purchased my ps58c6500 second hand two years, but was slowy getting worse (where I thought it was time to replace) until I happened to stumble across this forum. All I can say is thankyou as the logic file has completely fixed the problem!!!
Just a couple of things I had to do differently:
I could get into Hotel Mode (But everything was greyed out "...").
After a trying a few things, I thought as i'm only using an external YouView HDMI set top box, try plugging ariel cable into TV and tune.
Once complete mute 1-1-9 enter and there was my fully enabled hotel mode!
Next, trying to get into the service menu PowerOff,MENU 1-8-2,PowerOn wasn't working
Found the SamyGo Engineering Codes Wiki - PowerOFF,Info,Menu,Mute,PowerOn - Bingo!
Next "Control \ Hotel \ Clone TV to USB" and the "Control \ PDP" menu appeared but no Logic USB D/L???
Finally found option appeared after doing "Control \ Hotel \ Clone TV to USB" then go to "\ SVC \ Logic USB D/L" <- Possibly because i'm still on Firmware 3005.1???
As per the service bulletin even though my PS58C6500 isn't 3D, the matrix say use [3D58]Logic.bin and confirm this worked for me!