waeco cf 50 fridge

hello people. i have a waeco fridge cf50. the older type with a control panel with a series of led indicaters for temp. the micro switch controlling the temp is intermitly faulty. sticks.. have removed pressure pad and sprayed switch with electronic cleaner and seems to fix problem though switch does not have a very positive action.. does anyone know how to remove this contol panel so that i can have a good look. there are two self tapping screws under lid near internal light but no other indication of method of removal.. does anyone know the cost of replacement, and whether the new liquid crystal control panels are interchangeable

thank you for any help forthcoming bill....