Yes it has. The most common reason is deteriorating capacitors. They are square or round things placed in the pedal or near the three pin socket under the hand wheel on knee lever models.
There is info to be found on the web if you know what to search for. Not all pedals are like, there are a few varitions on them, some have one, others have two. You can simply remove them and it will be fine. You can replace them with new to. They are there to prevent electrical interferance in other appliances like TV and Radio.
Here's a blog post on it.