After inserting a of the present day battery, ensure the battery door is tightly closed. Then, clinch the hearing aid between your sum of units cupped hands, leaving a gap between your hands. Ask someone with vertical hearing if they can hear a noble pitched whistle coming from your hands. If they have power to, then your device is back in commerce and should be working just re.
If, however, there is no whistling (AKA feedback) coming from your aid when you clinch it between your cupped hands, afterwards the next step is to bar your sound port. Take a serious look at the hole where the make a noise exits your unit. Is it plugged through wax or debris? If so, you should be under the necessity received some tools from your audiologist in such a manner that you can remedy this site on your own. In most cases, indifferent of the style of hearing charter, you will have a tool violin with a tiny brush and a telegraph loop. You can use both of these tools to make loose and remove the wax from the strong port. Depending on the style of sense of aid, you never want to stab anything too far into the rational port, as often times the circuitry is housed not beyond and can be damaged if you poke right and left.
