Dreamer Homing Release Issue

Hi

I'm struck with my Dreamer for a week now. It all started with a grinding noise. This issue used to be sorted by resetting TF card and green color connectors on the back panel.

Late I realized that Z axis end stop is gone. So I replaced the end stop switch by soldering a new switch alone.

But the now the issue is when the machine is set to home, after the print bed reached top it used to release little from top. But now that is not happening.

Also when i give print after printer move to home status nothing is happening.

Request one of you to through light and how can i fix my printer.

Thanks

Krishna Vamshi