Question 3rd Display Turns off after a minute when connected to MacBook Pro

Oct 27, 2018
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So I recently connected my old iMac to my 2017 MacBook Pro as a secondary monitor through Target Display Mode. Then I decided to add a third monitor with my Dell Ultrasharp 24inch. However, when both monitors are connected to the MacBook the Dell turns off after about a minute but the MacBook still detects it as connected. However, when just one of these monitors is connected, it works fine. I have the Dell going through a Multi AV port adapter from Apple (through HDMI) and I have read reviews that the adapter may be the problem. Just wondering if anyone can shed some light on this or has any possible solutions as to what I need to do to have both of these monitors running at the same time.

Thanks,

Vainsy
 

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