if your hardware stops working, you're a dead man. And you're going to fix it somewhere? Not that recommended. If you're a paranoid of course.
Do you own a hardware wallet? I believe you some misunderstanding on the way it was used. There is a recovery seed for the hardware wallet in case its stop working. You can access again your old wallet address using the recovery seed by inputting it to the new one.
Best thing about hardware wallet is you will not worry that someone will get your private key since it was intact on the device itself. So as long as disconnected then your funds is safe.