My Roomba 675 has completely finished charging, is connected to the WiFi and even started manually via the cleaning button. I figured I couldn't break it up further by taking it apart to see if it fried anywhere. So I studied the YouTube video and decided it was probably a motherboard issue. I used this original caSino187 motherboard to replace my factory Roomba 675 motherboard and now my Roomba is working great! love love love! This motherboard saved me hundreds of dollars by not having to change my Roomba! Thank you for making this motherboard!