Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to troubleshoot an amp [title] To make sure the amp is really the problem, look to the side. [step] All amps have a green power led light and a red protect led light. [title] If both the green or red light are not on, then continue to the next steps.

Ending1: [title] If the red lights are on, your amp has been overcharged and is likely to blow. [step] The red light should always be turned off. Ending2: [title] Make sure the power is connected securely to the battery and connected properly to the 12v terminal on the amp. [title] The rem tells the amp that the radio is on and it should be too. Ending3: [title] Once they are both on, they will display the red and white light on the amp. [step] Once the red light goes on, and the white light goes off you are there to troubleshoot. Ending4: [title] Once you check to see if the amp is the problem, then move to the next step. [step] All amps have a green power led light and a red protect led light.

Answer format: ending1/ending2/ending3/ending4