It is a capacitor, in this case a tantalum. Basically you can put anything in the place or even nothing, so far I could read the print it is a 10uF/16v



The voltage regulator is located on the other side of the PCB in a large DPAK housing. I could not read it all because it is placed between 2 pcb's but it start with LM293.... probably a 2937 and it shows 3.3 so a 3.3v version. You can measure over the other capacitor if the voltage regulator is still alive.