i have a digital tv signal receiver, which comes with a remote control. the RC recently stopped working, so i've decided to check it out... obviously there isn't much sense into doing this, considering the price of it might be ~4$, but for the sake of not throwing a circuit board for something like a single electrolytic capacitor i gave this a quick check at least.
the board is named "KOR K4502A"
using an old russian multimeter "Gost 10374-74 USSR" = FTW
after opening the RC, the first suspect was a 16V electrolytic capacitor, which is connected in parallel to the input voltage, but it seems to be working fine.
i'm able to force an emission if i shortcircuit the transistor B/C junction, but that obviously isn't a good solution and i'm not really certain what is the cause at this point. might as well replace the RC (throw away the board) :sadface:.
update: i was able to exchange the remote control for a used one that works (for free). overall i think the problem was due to the main IC chip (for the keyboard control) not working correctly.