blkswats

Hello all. I'm new to the forum and was browsing and educating myself on the SC300. The problem that I'm having is the climate control and radio do not work. Purchased the vehicle from someone about 2 weeks ago and the climate control was working just fine until I turned it off. It hasn't been able to come back on since then. Ordered a new climate control module in hopes that it was just the module, but no dice. It lights up, indicating power, but no display. Also, went to change out the radio for an aftermarket one. Hooked everything up and nothing. All the fuses I've checked are good. Can anyone share their ideas on what could be the problem? I'm new to the Lexus world.