Hello
I have 2000 Honda Accord EX 4dr 4cyl
The problem I am having is that when I lock the doors, the buttons lock, however the alarm does not arm. The horn is supposed to beep, lights flash, and the led on the drivers door should blink. This is what happened for all the years that I had the car. But 2 weeks ago it stopped, so now when I lock the car, no horn no lights and no LED on the door. I have checked all the doors, trunk and hood- they close properly.
Could someone please help?
Thanks

Could be a fuse or a wire/connection. Can you tell where power needs to be applied, and verify.
Factory alarm?