I bought the HP Pavilion 22cwa 21.5-inch IPS LED Backlit Monitor off of Amazon to use as a second monitor with my MacBook. However, when using an HDMI cable, there is a connection problem and both the Mac and the monitor flash black repeatedly trying and failing to connect. Eventually the monitor will connect but this could take 5 minutes one day and 20 minutes the next. A Dell laptop connects instantly though, so I suspect it's a problem with my MacBook.
I talked with HP and they said it might be a resolution issue. Has anyone had this problem and were able to fix it by changing some resolution settings? Or anyone have an idea of what I can try to fix the connection issue? Thanks in advance!
Best Answer
I agree with HP - an incompatible resolution could certainly cause this problem, although it could be something else.
The recommended resolution for the HP Pavilion 22cwa 21.5-inch IPS LED Backlit Monitor you purchased is 1920 x 1080 pixels, so you could certainly play around with your settings in Apple > System Preferences > Displays to see what impact they have.
The other thing you can check are the various settings on the monitor itself by pressing the Menu button to access the On-Screen Display (OSD). One option that I've seen help many users is changing the Input settings on their monitors, such as turning the automatic input setting off and manually selecting the input.
If all of the above fails, there are some troubleshooting steps you can try on your MBP.
Reset the NVRAM
Older Macs had what's called Parameter RAM (PRAM), newer Macs use Non-Volatile Random-Access Memory (NVRAM). To reset this on your particular MBP, follow these steps:
Note: When you log back in you may need to readjust some of your system preferences (e.g. speaker volume, screen resolution, startup disk selection, time zone information, etc).
Boot into Safe Mode
Follow these steps to boot your Mac into Safe Mode:
Once you've booted into Safe Mode, let me know how you went and we'll go from there.