I've been investigating intermittent temperature-related strange
remote control operation in a brand new SDT-9077P. When some buttons are
pushed and held down e.g. 'Menu', it behaves as though the button's
being pushed twice or more, very quickly.
Turned out that the 47uF electrolytic cap in parallel with the
battery had an ESR of 16 ohms and might as well not have been there.
Replacing it with a decent quality 220uF completely fixed the problem.
There are lots of complaints about this issue with the SDT-9077P on
various forums. Looks like a batch of defective electrolytics have found
their way into these remotes.
To open the case, push your thumbnail into the gap between the top
and bottom case mouldings at the end furthest from the IR LED, then
carefully pop the clips apart on each side until you get to the LED end.


Bob