Join Date: Oct 1999
Location: San Jose, CA, USA
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How to fix a Monoprice 4 by 4 HDBaseT Matrix
The symptoms were that one of the channels no longer displayed the digital signal. St first I thought that the matrix itself had failed but to my glee, the problem was on the receiver end. And at that, it was merely that the external 5V/2 Amp power supply had failed. Out of all the potentially dreadful causes, this was by far the simplest and cheapest to fix. Indeed, Amazon sells an equivalent 5V supply for just $8.99. I bought one of these, whereupon the RX began working again. Since then, another channel failed, this time I just ordered another supply and the problem was fixed. In anticipation that this supply is a dominant cause of failures, I went ahead about two additional supplies and swapped them for the originals units. To sum up, for less than $40, I removed the Achilles heel of this system.
This all makes sense, since the innards of these units are based on Valens chips and layouts etc., similar to that of much m ore expensive brands. The robustness of the Valens chip/architecture is well known. I think these units inherit that as well.
So if you have a similar problem in the future, don't bother to call Support, just swap out that DC supply. Enjoy!