Folks

I have a 3790T (already discussed it here a couple of times) that is not working.

I sent it to a shop (here in Brasil) and the dignostic is that the component that controls the (re)charge of the battery is defective. This seems in line with the problem that I noticed when using the device.

Since the shop is in another state, I have no way to say if this diagnostic is acurate or not.

Questions are:

is there such component ? Some sort of "processor" or "controller" for the battery charge ?
The cost (parts and workmanship) of this component (down here) is around US$130.00

Any ideas ? Thanks !