Applies to: Lars Thrane LT-4100S GMDSS ·95-104951 Rev1.00 · 95-104951 Rev1.00 ·coverAugust2025 ·revisionrecord2025-08-27
Work through these checks
01 · Lars Thrane LT-4100S GMDSS ·95-104951 Rev1.00
Match the exact model, product code and manual edition. Record the existing connections, status indicators and displayed error without changing them. Preserve settings and stored data; do not reset, flash software, format storage or alter wiring as a first check. Keep account details, device identifiers and precise location private.
02 · LT-4100S / LT-4110S / LT-4130 / Network Status / Iridium Service / BAM Alerts / Network / Link Status / IP Address / GNSS Status / Dashboard
Match LT-4100S GMDSS to Lars Thrane document 95-104951 Rev 1.00: the cover says August 2025 and the revision record 27 August 2025. Keep it separate from LT-4100, LT-3100S and LT-4200S. Observe the existing Network Status icon and Iridium Service icon separately: registered with zero signal bars is a documented state, while active, idle and unavailable data have different icons. A flashing square at the upper left and cycling icons within a status group can be normal display behavior. Read existing BAM Alerts carefully under the vessel's safety procedure; record exact alert text without acknowledging or silencing it as a diagnostic shortcut. In Network, preserve Link Status and IP Address before changes; a local link to LT-4110S is not proof of working satellite internet. Keep GNSS Status and current position evidence separate from satellite registration. In an already authorized Dashboard session, record which expected units are visible, including LT-4110S and LT-4130, and their existing software versions; protect serial numbers, vessel identifiers and position. Do not disturb powered cabling or access the antenna, initiate distress/safety calls or messages, terminal or SSAS tests, activation, configuration changes, resets, reboots or firmware work; battery, charging, fuse and voltage work are excluded. The diagnostic report is encrypted for the manufacturer and has download/sending notice conditions; do not treat it as a freely readable log or automatically download or send it. This complete manufacturer-authored original is hosted by the existing Polaris distributor archive; current OEM manual endpoints returned 403. Historical examples do not guarantee current service, compatibility or GMDSS compliance.
When to stop and get help
Do not continue these checks in unsafe conditions. For immediate danger, use local emergency services and the device’s emergency instructions. Otherwise, contact your provider or a qualified technician.
What to tell support
Write down your exact model, service provider and on-screen message. Photograph the existing connections for your own reference before changing anything.
Original troubleshooting guidance based on the official sources below. Menu names can change. This is an independent guide, not a manufacturer service bulletin or a bench-tested repair.