98 Volvo V70 dashboard and some switches stopped working. Why?

What is your question?

Had a new radio installed. Something happened during installation. Later that night found I had no dash lights. Then found that the climate control panel didn't work, along with sunroof. But the electronic gauges on the dashboard are fine. Changed out the dimmer switch, and new blower motor. Checked the fuses. Fine. What am I missing?

How long has your 1999 Volvo V70 had this problem?

A few weeks