Monitor is changing colours from red, green to blue continuously

[Abdulhaq]

I have a mac-mini with an i5 intel processor. It is connected to a monitor model HP Pavilion 22xi. It was working fine till my family disconnected everything for the maintenance of the home. After the maintenance was over I tried to re-connect everything back. The mac-mini is booting fine. However I cannot see any display. The monitor is changing colors from red, green to blue continuously. I am not sure whether I am using the correct power adapter for the monitor. Therefore I bought a universal power adapter and configured the power as recommended by HP. But still the same problem persists. Kindly help me to resolve this issue.

 

[bobcomer]

The red-green-blue behavior means it isn't getting any signal from the computer, check your cable.

 

[Abdulhaq]

I have done that. I connected this same monitor to a Windows Desktop with a different cable and again I was getting the same changing of colors. The output from this Windows PC was also not coming on the display. Incidentally, the monitor gives the same red-green-blue behavior even if it is not connected to any computer.

 

[Rich B22]

I have done that. I connected this same monitor to a Windows Desktop with a different cable and again I was getting the same changing of colors. The output from this Windows PC was also not coming on the display. Incidentally, the monitor gives the same red-green-blue behavior even if it is not connected to any computer.

What kind of connection does the monitor have? Just wondering if in detaching/reattaching the monitor, that some pins were bent or broken on the monitor.

 

[Abdulhaq]

It has three connections which are HDMI, display port and VGA. I had connected to both mac-mini and the Windows PC to a display port. I will try to via other options the moment I get hold of the respective cables.

 

[bobcomer]

I have done that. I connected this same monitor to a Windows Desktop with a different cable and again I was getting the same changing of colors. The output from this Windows PC was also not coming on the display. Incidentally, the monitor gives the same red-green-blue behavior even if it is not connected to any computer.

Sounds like it might be a bad cable or connector.

 

[Abdulhaq]

On second thoughts I would like to ask you that since the monitor is displaying red-green-blue behavior by itself without any cables or any computer being connected to it then will trying to connect it with different cables help in any way.

 

[bobcomer]

On second thoughts I would like to ask you that since the monitor is displaying red-green-blue behavior by itself without any cables or any computer being connected to it then will trying to connect it with different cables help in any way.

Yes, as that red green blue is just a notification that it's not getting any signal. Once it gets a good signal, it should work.

That said it could be that the monitor is just bad, no way to tell without a known good cable.

 

[Abdulhaq]

I will try with different cables.

 

[Abdulhaq]

My problem is resolved now. I took it to a technician and he got the monitor working by connecting it with a replacement adapter with 19V output power.