Thread: Garmin Monterra - no battery charging and USB-PC connection

My friend bought a second hand Garmin Monterra 2 years ago. At the beginning the device was Ok but as the time went on the charging time was longer and longer. Now the rechargeable battery cannot be charged at all. The device is not detected by PC after connecting with USB cable. And the loudspeaker sound is very weak. I measured the voltage on battery terminals in the device when connected to PC or external charger with USB cable - the voltage was 0. So what to do in this situation? Is it a hardware or software problem? I cannot update Android via WiFi and garmin servers because there was a message that the software was the newest.