I will have one nuvi 350 for repair antena in couple of days and i can scan region from this nuvi and send it to you.

Can you please send me tutorial how can i create programmer for BGA chip?

I have nuvi 250W and 255W who dont turn on anymore. One nuvi have Sandisc inand BGA chip and another have samsung chip.
I like to try repair this nuvi but original programmer is 600$, so if you can help me with some shema how can i create programmer for BGA chip who have damaged boot area.