June 2017
I have three mini monitors but no power supplies, and would like to know what power supply to use. I have tried one of the three monitors using a 12 VDC at 500 mA supply and it came on for a nanosecond.
Since then, I have tried the same monitor several more times with the same supply, and also using my car’s battery, my lawn tractor’s battery, and even purchased and tried a 12 VDC at 1A supply all with the same results.
What is the power requirement for such mini monitors? I don’t want to burn any of them out using the trial and error method.
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I owned one of these. It uses 12V. It was designed as a vehicle media or backup monitor.
Those monitors are designed for automotive use and run off 12V, I have not measured the current requirement but it is not very high. Most of them require a valid video signal on one of the inputs to turn on, without that they go into standby mode.
These look like automotive backup camera displays, if so, they should use 12V for the power supply. They may also need a signal that tells the display that the car is in reverse.
The one I have in my van can be turned on manually with a button on the display so it is not powered by the backup lights.
This monitor looks like one I have used in the past and they need a video signal input before they will power up. The 12 volt 500 ma power supply should be fine.
These monitors are usually used for backup cameras in vehicles, which means they likely use 12 VDC. You didn’t mention if you had tried to feed a video signal into them when you applied power?
Backup cameras are typically wired to the reverse light of the vehicle, so that when you shift into reverse, the camera is powered and sends a signal to the monitor. The monitor then automatically turns on.
So perhaps this might be the issue, that the monitor needs a video signal to turn on?
