Resto Cluster Gauges Inoperable!

I removed my old but functional cluster. However, speedo not working just odometer. So looked for new speedo and is about 340 to 370 bucks! So ran across a restored cluster from Mr heaterbox out of Canada. Cluster comes refurbished with new circuit board, voltage limiter and restored and calibrated gauges. Install it and only speedo works! What can be wrong if all is renewed!?