MRV300-1 receiving card has been out of production for years. The MRV300-1 we sell is second-hand. But we have tested it before shipment and ensure that it works well.  You can try to use it to replace your defective MRV300-1. Please order it only when you don’t mind second-hand.

Single card support resolution 256×128,200×200;
Temperature monitoring;
Ethernet cable communication status detection;
Power supply voltage detection;
EU CE-EMC & EU UL standard;

The MRV328 is a new receiving card developed by NovaStar. A single MRV328 loads up to 256×256 pixels.Supports pixel level brightness and chroma calibration, which effectively removes color difference, greatly improves display consistency of LED images, and presents finer displays to users.