# Can't connect

**URL:** <https://forum.lulzbot.com/t/cant-connect/4549>\
**Category:** Software\
**Created:** [February 4, 2017, 7:27pm UTC](https://forum.lulzbot.com/t/cant-connect/4549 "2017-02-04T19:27:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![miclog](https://avatars.discourse-cdn.com/v4/letter/m/d6d6ee/32.png) [@miclog](https://forum.lulzbot.com/u/miclog)\
**Post date:** [February 4, 2017, 7:27pm UTC](https://forum.lulzbot.com/t/cant-connect/4549/1 "2017-02-04T19:27:09Z")

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In the Control dialog the Connect button stopped working. The caption says “Printing on Com4” but I can’t do anything. Win 10. HP laptop. Tried reinstalling Lulzbot Cura. Tried another Mini - same problem. Device mgr looks fine. Driver is up to date. Tried another cable. Tried factory config. Printers are a few years old. Cura 21.03. S/N KT-PR0035NA-1439. Tried reinstalling firmware via Cura menu. Tried different USB port. Power is on. Menu Expert | Run bed level wizard is greyed in one config but available in another config and allows to control Z motors via buttons so it seems USB is at least partly working. Anyone have any ideas?

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**Author:** ![miclog](https://avatars.discourse-cdn.com/v4/letter/m/d6d6ee/32.png) [@miclog](https://forum.lulzbot.com/u/miclog)\
**Post date:** [February 18, 2017, 12:33pm UTC](https://forum.lulzbot.com/t/cant-connect/4549/2 "2017-02-18T12:33:51Z")

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No solution so far. I tried:

- removing my wireless mouse
- uninstalling unnecessary apps
- in device manager port settings compared to known-good computer
- safe mode
- disable apps in task manager startup
- older version of Cura
- OHAI driver install for Marlin
- rebooting CPU
- spoke with 3 people at Lulzbot support

Anyone have any ideas?

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**Author:** ![gghouck](https://avatars.discourse-cdn.com/v4/letter/g/a88e4f/32.png) [@gghouck](https://forum.lulzbot.com/u/gghouck)\
**Post date:** [February 20, 2017, 8:31pm UTC](https://forum.lulzbot.com/t/cant-connect/4549/3 "2017-02-20T20:31:35Z")

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Were you doing anything inside the electronics box before this? Is it possible you blew one of the tiny fuses on the Rambo?