2007 Yaris RS hatchback 5 speed, speedo tach not working

[Darren]

Please help!!! I removed the cluster from the dash to clean it, had so much dust I could barely see through! Everything worked properly beforehand. Now when I put the key in the ignition both speedo and tach drop and don't go to zero they function but are off. After they drop I can zero them by hand before I start it and all is good until I turn the ignition off and after 3 minutes or so you can hear the computer click and turn off at that point it starts all over with the gages dropping upon putting the key in. I went to the dealer because I thought that maybe it needed to be reprogrammed or zeroed they said no... I really hope I didn't break it. I will take a video and attach it if I can.