Losing signal intermittently every 1-5 minutes

I am living close to bart and whenever the bart passes, I lose signal of my tv.

This problem is probably due to weak signal strength from the cable to the television. Buy a signal amplifier for you cable line in and use another cable out of the amplifier output to your Television input signal source, This should bring up the signal strength for you.You could also have your cable company check the input signal strength to you house or apartment and see if the cable itself needs repairing or replacing.If this does not help with your problem , then you need to have your television tuners signal input circuit tested it may have weakened from age. This may be adjustable in the tuner box, but this is something for a service technician to determine. customer service number for Insignia is 1-877467-4289. Hope this helps you with your problem