Resident mode means the main board has issues and only the basic function are available. It won't communicate to OL2, OL, Chemstation, Masshunter , etc. But it should be able to communicate to Lab advisor.
Before parts need to be replaced there are 2 things to try.
1) Forced cold start: see How to perform a cold start for 1200 series LC modules
2) Flash the firmware: Make sure the firmware is from the same set as the other modules.
Download the firmware you need from the correct firmware set Download Firmware
If lab advisor is not downloaded, choose Firmware Update Tools & Procedures and download the first choice.
Download the module specific firmware plus the resident firmware
Please choose the main and resident firmware you want to load.
once you Lock it and start the download ... DO not interrupt the download. wait for it to unlock to do anything.
If a forced cold start or flashing the firmware does not work, then a repair will be needed.
Please contact your local service group for an on-site repair or possible bench repair or exchange.
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Actually flashing the Firmware with Lab Advisor automatically performs a Forced Coldstart after the firmware is upgraded, so no need to do it manually via the dipswitches.
In newer versions of Lab Advisor (B.02.10+) you don´t have to manually download the firmware beforehand either. If you have an active internet connection you can just select the firmware you want to use via the "Select Market Location" dropdown and the required files are automatically downloaded from the internet.