hi, I need help

1) Bricked device Nuvi 52, Firmware version= 4.00, HWID=1613

2) I installed updated map in system folder and new JVc file and used a 12v car charcher diffrent than the original charger.

3) Symptoms: what's wrong in your device?..I cannot put it in mass storage when open the volume icon and press on the top right corner of the screen nothing happens i cannot configuer the mass storage to get
SYS. folder.

4) Does your pc sees your device ?..it does not see my device at all....but i can use updater.exe to flash the software by holding the left screen upper corner.Device Manager, Garmin Express, or the Garmin website
plugin cant see my device.

5) List all the procedures you already tried to unbrick it and their results and errors messages obtained ...I tried all the procedures in the form..non work.

6) Do you have Garmin USB Drivers installed ? yes.

7) Write down if you already read or tried GarminCure3 tool - the new way to create cure firmwares for Garmin devices
....yes I tryed this method..my computer see my device for a second then disapears

8) Can you reach preboot mode? yes i can use Garmin Updater.exe v.2.8.0 in preboot mode

9) Probably no , but do you have NV backup? No

I need the computer to see my device, i can flash my nuvi with updater.exe but i cannot get into mass storage.

thank you