Hi! I tried to repair this nuvi 50 GPS for a friend of mine. At first, I tought it was just a simple battery replacement, but seems to be the battery charging circuit on the main board, because it works with USB power on, it works with another full-charged battery connected to the board but doesn't work with the discharged battery (the original battery was tested and is OK, it was only discharged) until connected to the USB Power which the charging icon appears but doesn´t charge the battery. I need help identifying the two semiconductor components near the battery connector, the transistor like 052R3 and the HDW 2SAA which I think are involved with the battery charging. Voltage Readings without battery are
1- 0V
2- 0V
3- 0V
4- 5.25V
5 - 4.4V
With Battery ON
1- 3.7V
2- 3.7V
3- 3.7V
4- 5.25V
5- 4.4V
Something is not switching, anyway, thanks for the replies!!