Hi, my K+Dcan cable died. It is not cheap shit from ebay or aliex, it is from One stop electronics. It worked about 3 years, usb cable broke a few times, but i always solder it and it worked. Mostly broken shielding. Last time was broken shielding and ground. Repaired it, but when i connect it to pc, nothing happens, no new hardware. I checked some connection inside and i have 5V where it should be. There are Atmel Atmega162, ATF16V8B and FTDI ft232rl. Do you think it is worth replacing ft232rl?

I have ordered new cable. but i would like to know what is the problem.
Thanks