Hi, I have a Garmin Nuvi 65LM, I bought it second hand and it's just the unit. I bought 3 mini USB cables and after I tried them on my laptop, Nuvi was not detected on the laptop. I use a dual boot laptop (Windows 11 and Windows 7)
I have also tried it on various laptops and the result is that my Garmin Nuvi still doesn't detect it.
I have also tried to re-solder it and still no results.
Because of that I can't do a software update for my Garmin.

After searching for a few hours, I found the latest firmware for the nuvi 65lm which is "nuvi65_66_560.gcd"
I tried updating via SD card by changing it to "GUPDATE.GCD" and I put it in the Garmin folder. Restart Garmin and it says "Software loading" and after a few moments the screen turns off and the device suddenly restarts itself and so on. just like bootloop

Has my Garmin nuvi 65lm been affected by "Hardware failure"?