MacBook Pro (2018) stopped detecting external monitor
My new MacBook Pro suddenly stopped recognizing an external monitor (Dell U2515H) after 2 days of normal usage.
Yesterday, after I was done with my work, I closed the lid as usual and today, I opened the MacBook and the external monitor didn't get detected.
The monitor is connected via USB-C -> HDMI cable (cost about 20$).
I have already tried restarting my Mac, reconnecting the monitor and detecting monitors in System Preferences. I have also tried resetting SMC and NVRAM. Unfortunately none of it worked.
Detailed info:
- MacBook Pro (2018) - 15", i7
- Mac OS High Sierra - 10.13.6
- USB-C to HDMI cable
- Monitor: Dell U2515H
Any help is highly appreciated as I really need my external monitor for work.
Similar issue with Philips monitor, MacBook Pro 2017 TB, and Digitus USBC-DP dongle. My solution:
- Remove the power cable from the external monitor, wait 5-10 seconds, put it back in.
This might seem silly but this worked for me (also better to exhaust all options):
I use a dock connected into the thunderbolt port. My charger connects into the dock and so does the monitor (dp to mdp cable). My Dell U2715H suddenly stopped working too. I tried a bunch of different things but nothing worked. I decided to take my laptop to a service center. I just happened to remove my charger from the dock first (with the monitor still connected) and suddenly the desktop showed up on my monitor and every thing was working fine. I just connected my charger back and everything was back to normal.