MySky HDi, black. 3 screw remote. Remove battery cover, remove batteries. 2 screws under battery cover, one screw under IR cover. IR cover ... place index finger on top IR window section, place thumb on rear section furtherest from front ... if you have a thumb-nail try to hook it into IR window/body gap at rearmost window point (not essential, but helps) ... if you have thumb-nail, push down with thumb-tip and pull forward ... if no thumb-nail, give up nail biting, push down with thumb and pull forward with thumb-pad and index finger ... if it doesn't slide forward fairly easily you are doing something wrong. Remove screw. Pull case halves apart as adequately described elsewhere in forum. Lift circuit board off pins ... no further screws or clips (my one, that is) ... clean contacts both sides with meths, surgical alcohol or other appropriate electrical contact cleaner.
Now, the bit I really wanted to add. I was having to do this every six months or so. Not the end of the world but irritating. Last time I put 2 small silica gel (desiccant) packs ex pill bottles, on top of the circuit board in front of the IC ... remote upside down, non contacts side ... there's a bit of lower case-half room there. Appears to have extended serviceability 25% to 50%. Reassemble. Might try leaving remote on top of the MySky decoder when finished at night ... see if warmth helps keep contacts serviceable longer (???).
PhredNZ, May 2013