# WP7607-1 - infinite bootloop when disconnect main antennas LTE

**URL:** <https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714>\
**Category:** Uncategorized\
**Created:** [July 13, 2018, 2:48pm UTC](https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714 "2018-07-13T14:48:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Francis.duhaut](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/francis.duhaut/32/350_2.png) [@Francis.duhaut](https://mangoh.discourse.group/u/Francis.duhaut)\
**Post date:** [July 13, 2018, 2:48pm UTC](https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714/1 "2018-07-13T14:48:34Z")

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Hello all,

I use WP7607-1 and MangOH Red. Firmware R9 / Legato 18.05.1.

When I disconnect the LTE antennas (MAIN CN301) the system reboot in infinite loop.

I have only a avcController installed (no applications).

If I reconnect the infinite loop stop.

Any idea ? I will publish the log next week the board is in test for the moment.  
Thanks  
Francis.

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**Author:** ![alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@alex1](https://mangoh.discourse.group/u/alex1)\
**Post date:** [July 13, 2018, 8:11pm UTC](https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714/2 "2018-07-13T20:11:34Z")

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Hello Francis,

My team has already encountered that kind of problem with different modules (WP7607 and WP8548) when we disconnected antennas while the board was still running. This move could create some current which makes the board ‘crazy’. So the solution would be always power board off when we want to put antennas on or off.  
If other may know more, I am also curious to hear about it.

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**Author:** ![asyal](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/asyal/32/78_2.png) [@asyal](https://mangoh.discourse.group/u/asyal)\
**Post date:** [July 13, 2018, 10:23pm UTC](https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714/3 "2018-07-13T22:23:08Z")

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can you show what you see in logread -f ?

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**Author:** ![Francis.duhaut](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/francis.duhaut/32/350_2.png) [@Francis.duhaut](https://mangoh.discourse.group/u/Francis.duhaut)\
**Post date:** [July 14, 2018, 6:16am UTC](https://mangoh.discourse.group/t/wp7607-1-infinite-bootloop-when-disconnect-main-antennas-lte/1714/4 "2018-07-14T06:16:20Z")

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Yes I will put the log on Monday.  
Good week end