# Boron Won't Connect - Flashing Green **URL:** \ **Category:** Connectivity\ **Tags:** boron\ **Created:** [November 27, 2024, 3:58am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697 "2024-11-27T03:58:10Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![gschmitt](https://avatars.discourse-cdn.com/v4/letter/g/fbc32d/32.png) [@gschmitt](https://community.particle.io/u/gschmitt)\ **Post date:** [November 27, 2024, 3:58am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/1 "2024-11-27T03:58:10Z")
I have a Boron that for the past months has held a stable connection and has run with no issues. Then on September 16, 2024 it lost connectivity and since will flash green and never connect. I've read similar forum entries and tried Device Doctor and Particle CLI over a USB connection. It appear to be the internal SIM is no longer registered to my account. Any assistance on possible next steps in troubleshooting are appreciated. Below is an image from SIM ICCID lookup where it indicates the SIM is not in my account. ![image](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/8/3/83d0887fefeca8e5e4112850f13eac5eb723c3ac.png) ---
**Author:** ![rickkas7](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rickkas7/32/8681_2.png) [@rickkas7](https://community.particle.io/u/rickkas7)\ **Post date:** [November 29, 2024, 10:40am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/2 "2024-11-29T10:40:13Z")
It's OK if the SIM is in a product; that screenshot is normal. Go into that product and into the SIM cards tab to make sure it's active. Getting a debug log is the next step to see exactly why the device will not connect. ---
**Author:** ![gschmitt](https://avatars.discourse-cdn.com/v4/letter/g/fbc32d/32.png) [@gschmitt](https://community.particle.io/u/gschmitt)\ **Post date:** [December 1, 2024, 3:28am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/3 "2024-12-01T03:28:46Z")
@rickkas7 As you suspected, the SIM appears to be active. See below. ![image.png](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/6/c/6c4952b9881bf5e6c1773be1fae781dc9b4e80da.png) Attached is a debug log for this device that is constantly flashing green and will not connect. This is after it had been working fine in the same location for several months. Also, I have another boron on the same desk that is working fine so I know the cellular environment is adequate. I appreciate you responding over the holiday and am grateful for your review of the log and any guidance you can provide. Thanks, Gil (Attachment DeviceID4226aafaLog.txt is missing) ---
**Author:** ![gschmitt](https://avatars.discourse-cdn.com/v4/letter/g/fbc32d/32.png) [@gschmitt](https://community.particle.io/u/gschmitt)\ **Post date:** [December 1, 2024, 3:33am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/4 "2024-12-01T03:33:55Z")
Device ID: e00fce68XXXXXXX54226aafa (Middle characters replaced with Xs.) ICCID: IMEI: IMSI: Modem Manufacturer: Modem Model: Modem Firmware Version: Modem Application Version: Power Supply: Battery: Battery SoC: Country: Carrier: Access Technology: Band: Cellular Global Identity: 0000000398 [system.nm] TRACE: Request to power on interface 4 0000000398 [ncp.client] TRACE: Powering modem on, ncpId: 0x44 0000000399 [ncp.client] TRACE: Modem already on 0000000399 [ncp.client] TRACE: Setting UART voltage translator state 1 0000000401 [system.nm] INFO: State changed: DISABLED -\> IFACE\_DOWN 0000000500 [ncp.client] TRACE: Setting UART voltage translator state 0 0000000600 [ncp.client] TRACE: Setting UART voltage translator state 1 0000000600 [ncp.client] TRACE: Muxer is not currently running 0000000601 [ncp.client] TRACE: Initialized muxer @ 460800 baudrate 0000000602 [mux] INFO: Starting GSM07.10 muxer 0000000603 [mux] INFO: GSM07.10 muxer thread started 0000000903 [mux] INFO: Stopping GSM07.10 muxer 0000000903 [mux] INFO: Gracefully stopping GSM07.10 muxer 0000000904 [mux] INFO: Closing all muxed channels 0000000904 [mux] INFO: Muxed channel 1 already closed 0000000905 [mux] INFO: Muxed channel 2 already closed 0000000906 [mux] INFO: Muxed channel 3 already closed 0000000906 [mux] INFO: Muxed channel 4 already closed 0000001198 [app] INFO: Auto-connect disabled 0000001557 [mux] INFO: Sending CLD (multiplexer close down) 0000002457 [mux] INFO: Received response to CLD or timed out, exiting multiplexed mode 0000002507 [mux] INFO: GSM07.10 muxer thread exiting 0000002507 [mux] INFO: GSM07.10 muxer stopped 0000002508 [ncp.client] TRACE: Initialized muxer @ 115200 baudrate 0000002509 [mux] INFO: Starting GSM07.10 muxer 0000002510 [mux] INFO: GSM07.10 muxer thread started 0000002810 [mux] INFO: Stopping GSM07.10 muxer 0000002810 [mux] INFO: Gracefully stopping GSM07.10 muxer 0000002811 [mux] INFO: Closing all muxed channels 0000002811 [mux] INFO: Muxed channel 1 already closed 0000002812 [mux] INFO: Muxed channel 2 already closed 0000002813 [mux] INFO: Muxed channel 3 already closed 0000002813 [mux] INFO: Muxed channel 4 already closed 0000003464 [mux] INFO: Sending CLD (multiplexer close down) 0000004364 [mux] INFO: Received response to CLD or timed out, exiting multiplexed mode 0000004414 [mux] INFO: GSM07.10 muxer thread exiting 0000004414 [mux] INFO: GSM07.10 muxer stopped 0000004416 [ncp.at] TRACE: \> AT 0000005416 [ncp.at] TRACE: \> AT 0000006416 [ncp.client] TRACE: Modem is not responsive @ 460800 baudrate 0000006417 [ncp.at] TRACE: \> AT 0000007417 [ncp.at] TRACE: \> AT 0000008417 [ncp.at] TRACE: \> AT 0000009417 [ncp.at] TRACE: \> AT 0000010417 [ncp.at] TRACE: \> AT 0000011417 [ncp.client] TRACE: Modem is not responsive @ 115200 baudrate 0000011417 [ncp.client] ERROR: No response from NCP 0000011421 [app.cellinterp] INFO: processLog match ts=11417 category=ncp.client level=ERROR msg=No response from NCP 0000011422 [app] INFO: got no response from NCP 0000011418 [ncp.client] TRACE: Setting UART voltage translator state 0 0000011418 [ncp.client] TRACE: Hard resetting the modem 0000011419 [ncp.client] TRACE: Modem waiting up to 30s to power off with PWR\_UC... 0000052422 [net.pppncp] TRACE: NCP event 3 0000052422 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_DOWN 0000052423 [system.nm] TRACE: Interface 4 power state changed: DOWN 0000052423 [ncp.client] TRACE: Deinit modem serial. 0000052424 [net.pppncp] ERROR: Failed to initialize cellular NCP client: -210 0000052525 [ncp.client] TRACE: Powering modem on, ncpId: 0x44 0000052525 [net.pppncp] TRACE: NCP event 3 0000052526 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_POWERING\_UP 0000052526 [system.nm] TRACE: Interface 4 power state changed: POWERING\_UP 0000052677 [net.pppncp] TRACE: NCP event 3 0000052677 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_UP 0000052678 [system.nm] TRACE: Interface 4 power state changed: UP 0000052678 [ncp.client] TRACE: Modem powered on 0000052679 [ncp.client] TRACE: Setting UART voltage translator state 1 0000052779 [ncp.client] TRACE: Setting UART voltage translator state 0 0000052879 [ncp.client] TRACE: Setting UART voltage translator state 1 0000053880 [ncp.at] TRACE: \> AT 0000054880 [ncp.at] TRACE: \> AT 0000055880 [ncp.at] TRACE: \> AT 0000056880 [ncp.at] TRACE: \> AT 0000057880 [ncp.at] TRACE: \> AT 0000058880 [ncp.at] TRACE: \> AT 0000059880 [ncp.at] TRACE: \> AT 0000060880 [ncp.at] TRACE: \> AT 0000061880 [ncp.at] TRACE: \> AT 0000062880 [ncp.at] TRACE: \> AT 0000063880 [ncp.at] TRACE: \> AT 0000064880 [ncp.at] TRACE: \> AT 0000065880 [ncp.at] TRACE: \> AT 0000066880 [ncp.at] TRACE: \> AT 0000067880 [ncp.at] TRACE: \> AT 0000068880 [ncp.client] ERROR: No response from NCP 0000068882 [app.cellinterp] INFO: processLog match ts=68880 category=ncp.client level=ERROR msg=No response from NCP 0000068884 [app] INFO: got no response from NCP 0000068880 [ncp.client] TRACE: Setting UART voltage translator state 0 0000068881 [ncp.client] TRACE: Hard resetting the modem 0000068881 [ncp.client] TRACE: Modem waiting up to 30s to power off with PWR\_UC... 0000109882 [net.pppncp] TRACE: NCP event 3 0000109882 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_DOWN 0000109883 [system.nm] TRACE: Interface 4 power state changed: DOWN 0000109883 [ncp.client] TRACE: Deinit modem serial. 0000109884 [net.pppncp] ERROR: Failed to initialize cellular NCP client: -210 0000109985 [ncp.client] TRACE: Powering modem on, ncpId: 0x44 0000109985 [net.pppncp] TRACE: NCP event 3 0000109986 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_POWERING\_UP 0000109986 [system.nm] TRACE: Interface 4 power state changed: POWERING\_UP 0000110137 [net.pppncp] TRACE: NCP event 3 0000110137 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_UP 0000110138 [system.nm] TRACE: Interface 4 power state changed: UP 0000110138 [ncp.client] TRACE: Modem powered on 0000110139 [ncp.client] TRACE: Setting UART voltage translator state 1 0000110239 [ncp.client] TRACE: Setting UART voltage translator state 0 0000110339 [ncp.client] TRACE: Setting UART voltage translator state 1 0000111340 [ncp.at] TRACE: \> AT 0000112340 [ncp.at] TRACE: \> AT 0000113340 [ncp.at] TRACE: \> AT 0000114340 [ncp.at] TRACE: \> AT 0000115340 [ncp.at] TRACE: \> AT 0000116340 [ncp.at] TRACE: \> AT 0000117340 [ncp.at] TRACE: \> AT 0000118340 [ncp.at] TRACE: \> AT 0000119340 [ncp.at] TRACE: \> AT 0000120340 [ncp.at] TRACE: \> AT 0000121340 [ncp.at] TRACE: \> AT 0000122340 [ncp.at] TRACE: \> AT 0000123340 [ncp.at] TRACE: \> AT 0000124340 [ncp.at] TRACE: \> AT 0000125340 [ncp.at] TRACE: \> AT 0000126340 [ncp.client] ERROR: No response from NCP 0000126342 [app.cellinterp] INFO: processLog match ts=126340 category=ncp.client level=ERROR msg=No response from NCP 0000126344 [app] INFO: got no response from NCP 0000126340 [ncp.client] TRACE: Setting UART voltage translator state 0 0000126341 [ncp.client] TRACE: Hard resetting the modem 0000126341 [ncp.client] TRACE: Modem waiting up to 30s to power off with PWR\_UC... 0000167342 [net.pppncp] TRACE: NCP event 3 0000167342 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_DOWN 0000167343 [system.nm] TRACE: Interface 4 power state changed: DOWN 0000167343 [ncp.client] TRACE: Deinit modem serial. 0000167344 [net.pppncp] ERROR: Failed to initialize cellular NCP client: -210 0000167445 [ncp.client] TRACE: Powering modem on, ncpId: 0x44 0000167445 [net.pppncp] TRACE: NCP event 3 0000167446 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_POWERING\_UP 0000167446 [system.nm] TRACE: Interface 4 power state changed: POWERING\_UP 0000167597 [net.pppncp] TRACE: NCP event 3 0000167597 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_UP 0000167598 [system.nm] TRACE: Interface 4 power state changed: UP 0000167598 [ncp.client] TRACE: Modem powered on 0000167599 [ncp.client] TRACE: Setting UART voltage translator state 1 0000167699 [ncp.client] TRACE: Setting UART voltage translator state 0 0000167799 [ncp.client] TRACE: Setting UART voltage translator state 1 0000168800 [ncp.at] TRACE: \> AT 0000169800 [ncp.at] TRACE: \> AT 0000170800 [ncp.at] TRACE: \> AT 0000171800 [ncp.at] TRACE: \> AT 0000172800 [ncp.at] TRACE: \> AT 0000173800 [ncp.at] TRACE: \> AT 0000174800 [ncp.at] TRACE: \> AT 0000175800 [ncp.at] TRACE: \> AT 0000176800 [ncp.at] TRACE: \> AT 0000177800 [ncp.at] TRACE: \> AT 0000178800 [ncp.at] TRACE: \> AT 0000179800 [ncp.at] TRACE: \> AT 0000180800 [ncp.at] TRACE: \> AT 0000181800 [ncp.at] TRACE: \> AT 0000182800 [ncp.at] TRACE: \> AT 0000183800 [ncp.client] ERROR: No response from NCP 0000183802 [app.cellinterp] INFO: processLog match ts=183800 category=ncp.client level=ERROR msg=No response from NCP 0000183804 [app] INFO: got no response from NCP 0000183800 [ncp.client] TRACE: Setting UART voltage translator state 0 0000183801 [ncp.client] TRACE: Hard resetting the modem 0000183801 [ncp.client] TRACE: Modem waiting up to 30s to power off with PWR\_UC... 0000224802 [net.pppncp] TRACE: NCP event 3 0000224802 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_DOWN 0000224803 [system.nm] TRACE: Interface 4 power state changed: DOWN 0000224803 [ncp.client] TRACE: Deinit modem serial. 0000224804 [net.pppncp] ERROR: Failed to initialize cellular NCP client: -210 0000224905 [ncp.client] TRACE: Powering modem on, ncpId: 0x44 0000224905 [net.pppncp] TRACE: NCP event 3 0000224906 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_POWERING\_UP 0000224906 [system.nm] TRACE: Interface 4 power state changed: POWERING\_UP 0000225057 [net.pppncp] TRACE: NCP event 3 0000225057 [net.pppncp] TRACE: NCP power state changed: IF\_POWER\_STATE\_UP 0000225058 [system.nm] TRACE: Interface 4 power state changed: UP 0000225058 [ncp.client] TRACE: Modem powered on 0000225059 [ncp.client] TRACE: Setting UART voltage translator state 1 0000225159 [ncp.client] TRACE: Setting UART voltage translator state 0 0000225259 [ncp.client] TRACE: Setting UART voltage translator state 1 0000226260 [ncp.at] TRACE: \> AT 0000227260 [ncp.at] TRACE: \> AT 0000228260 [ncp.at] TRACE: \> AT 0000229260 [ncp.at] TRACE: \> AT 0000230260 [ncp.at] TRACE: \> AT 0000231260 [ncp.at] TRACE: \> AT 0000232260 [ncp.at] TRACE: \> AT 0000233260 [ncp.at] TRACE: \> AT 0000234260 [ncp.at] TRACE: \> AT 0000235260 [ncp.at] TRACE: \> AT 0000236260 [ncp.at] TRACE: \> AT 0000237260 [ncp.at] TRACE: \> AT 0000238260 [ncp.at] TRACE: \> AT 0000239260 [ncp.at] TRACE: \> AT 0000240260 [ncp.at] TRACE: \> AT 0000241260 [ncp.client] ERROR: No response from NCP 0000241262 [app.cellinterp] INFO: processLog match ts=241260 category=ncp.client level=ERROR msg=No response from NCP 0000241264 [app] INFO: got no response from NCP 0000241260 [ncp.client] TRACE: Setting UART voltage translator state 0 0000241261 [ncp.client] TRACE: Hard resetting the modem 0000241261 [ncp.client] TRACE: Modem waiting up to 30s to power off with PWR\_UC... ---
**Author:** ![rickkas7](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rickkas7/32/8681_2.png) [@rickkas7](https://community.particle.io/u/rickkas7)\ **Post date:** [December 1, 2024, 9:55am UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/5 "2024-12-01T09:55:17Z")
It appears that the cellular modem module has failed. > 0000068880 [ncp.client] ERROR: No response from NCP Since your device appears to be a Boron LTE manufactured in 2018, this could be caused either by [TAN001](https://docs.particle.io/reference/technical-advisory-notices/tan001-sara-r410m-124-day/) or [TAN004](https://docs.particle.io/reference/technical-advisory-notices/tan004-power-off-recommendations-for-sara-r410m-equipped-devices/). Unfortunately there is no way to repair a device in this state. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/3/2/3291e3c9351789fe8620ae5bcec8d3fec67ff221.png) [@system](https://community.particle.io/u/system)\ **Post date:** [June 1, 2025, 9:56pm UTC](https://community.particle.io/t/boron-wont-connect-flashing-green/68697/6 "2025-06-01T21:56:10Z")
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