2008 Toyota Corolla doesn't start when key moved forward to "start" position

When I went to leave work tonight, the car wouldn’t start. I’ve tried two known good keys, and cleaning the battery posts and cables where they connect to the posts.

There has been no indication the starter or battery is bad. I’m going to take both to autozone to have them tested, but I was hoping for some pointers ahead of time because I won’t be able to take them out until Sunday.

Some observations:

• No error codes

• No clicking like it’s trying to start

• Key “security” light stops blinking when the aforementioned keys are inserted

• Battery measures 12.2 V when disconnected from car

• Interior and trunk lights are at full brightness

• I can see the dash lights and clock dim when I try to start without the clutch pushed in

• I can see the dash lights and clock dim and I hear the faintest hum when I try to start with the clutch pushed in

• Cranking amperage measured low (2/3?) when I had the oil changed at Valvoline in February, but there’s been no indication of weak starts

I managed to start and drive it home because I parked directly in front of a decline ramp. I pushed the car backwards to the top of the ramp, jumped in, put it in reverse and let out the clutch. It started and ran just fine. On the way home, I was coasting downhill for a few hundred yards. I took it out of gear, shut off the car, pulled the key out, put it back in, and tried to start. No starter activity.