Bad Modem

Best I can tell, the modem is bad in the Mac. It doesn't even recognize the modem anymore. I checked it out and it is connected properly. I'll have to get another modem. One of the memory cards has gone bad, too. I can do without that. And starting last night the power adapter broke, but that was my fault. Sometimes I can be so clumsy. I can't do without that. What's next?