I've done nearly everything
but replace the actual heater cover. But yes you are in the correct thread and there is some posts of others here who have been successful.
So when you power up the EQ, does the LED come up at all? Do you get any of the indicator lights? The EQ's transformer does need a little time to recharge. It is the power block and cord that plugs into the unit. Make sure that it's
green first before powering up the unit. Fingers crossed is that the transformer drained itself while you was tinkering with the unit and needs time to catch up.
Still no luck? If you open up the EQ again perhaps do a systems check to see if the fan is plugged in. Or if the sensor in the heater is where it belongs. Or if the ribbon cable ejected itself when putting things back together. Hope this helps.