Thread: Dead 3790

'Bricked or Partly-bricked' = 'Pregnant or Partly-pregnant'.

In truth, most units aren't bricked in the literal sense although we all use the term when we mean that the device has a firmware or corrupt files problem. But really if it can be recovered it's not 'a brick'. Unfortunately, some units are irrecoverable and it's often due to a hardware problem. Sometimes it will show a very faint light on the screen if you take the unit into a very dark room and hold the on button down. 37x0 are a hardy lot and hard to 'fully brick'.

Try connecting it with a usb lead to your PC to charge it rather than the car charger for an extended period. If no go ... so .... open it up and disconnect the battery for a while. You know the drill by now Ducky.

Plug unit to Pc and try to hold power button 10 sec if nuvi will turn on.
Try hold 60 sec power button
Unplug nuvi, try to hold 30 sec power button and then connect nuvi to Pc.
Try to clean usb plug on nuvi.
Try to change usb cable.
Try to connect nuvi in car.

Go to some dark place and turn on nuvi and look if nuvi turn on light on display in corners.

Test Individual parts "display", "Battery" etc in your other Nuvi.
Most probably you have a dead board.

I think an autopsy is in order Dr Mallard! [are you an NCIS fan?]. Good advice again from dasilvarsa. Most likely it's hardware failure, i suspect there is some common component in 37xx hw which fails because every now and then one will defy all efforts of recovery and remain 'dead'. You could try flexing the board a little while powering on but even if the pcb is cr@cked or if it's a 'dry-joint' type of fault it's toast anyway imo. Boards aren't worth messing around with these days ....

You and i must be living in parallel universes. I had a 3790 in bits in my parts drawer which i bought cheap a year or so back as 'For parts or not working' on eBay. I couldn't coax it back to life. Individually the screen and battery work with another 3790, but known-working battery and screen won't work with its board. Gone coon. Picked up another 3790 on eBay just recently described as the screen having 'bubbles at one end', this one:

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The traffic receiver and mount alone are each worth what i paid for it. Quick screen switch from the dead one and its all good.