Dashboard dinging, without any lights

I just had Les Schwab do some repairs, among which they installed my tire pressure guages into the tires, which were missing. The tire pressure dash light is now properly unlit, however there is still a constant "Ding"ing coming from the dash. The tire pressure guages were my first thought, until they were installed and the light turned off. Obviously, the dinging is from something else. However comma there are no other lights lit on my dash. What could be causing the dinging?

P.S. On a side note, in the right console (Engine Temp guage) there are two little lights shining through, but not error lights. It looks almost like there is a pin hole punched through and I'm seeing lights leaking through from behind. No regular error lights are lit up though.