The clock is an LED display (no light). Most often, the reason the clock doesn't display is the 5 resistors have bad soldier points. One of the many websites that show how to repair the soldier points and therein the clock is .
I have a 2005 Corolla S and a 2017 Camry Hybrid. I love both cars a lot but for different reasons. The Camry definitely is a lot more comfortable (I am 6'2") and quiet. I get mid 30's mpg in town and low 40's highway with both cars. The main reason we got the Camry is to be able to cary more...
I had a case on my 2005 Corolla S that has a squeal coming from the engine compartment. Turned out that the serpentine belt tensioner pully had a bad bearing. Replaced the tensioner fully and the sound went away.