The heat sinks that came on my printer were attached with foam tape! The drivers actually worked better with the heat sinks removed. The foam tape actually insulates the driver keeping it warmer. I ordered new heat sinks and after installing everything is great. If you press on the heat sink and can see it get closer to the board you probably have foam tape.
WATCH OUT FOR FOAM TAPE!
I hope this info makes it up the chain. I do not monitor this username or thread.
WATCH OUT FOR FOAM TAPE!
I hope this info makes it up the chain. I do not monitor this username or thread.