--- title: Sapiens - How do you solve the error message “A00 communication alarm with base”? description: This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions. --- [Skip to content](https://support.lainox.com/en/knowledge/sapiens-how-to-resolve-error-message-a00-communication-alarm-with-base#main-content) - [English](https://support.lainox.com/en/knowledge/sapiens-how-to-resolve-error-message-a00-communication-alarm-with-base) - [Deutsch](https://support.lainox.com/de/knowledge/sapiens-wie-löst-man-das-problem-der-fehlermeldung-a00-alarm-kommunikation-mit-basisplatine) - [Español](https://support.lainox.com/es/knowledge/sapiens-cómo-resolver-un-mensaje-de-error-a00-alarma-de-comunicación-con-la-tarjeta-base) - [Français](https://support.lainox.com/fr/knowledge/sapiens-comment-résoudre-le-message-derreur-a00-alarme-communication-avec-carte-principale) - [Italiano](https://support.lainox.com/knowledge/support.lainox.com/knowledge/sapiens-come-risolvere-messaggio-errore-a00-allarme-comunicazione-con-base) English Show submenu for translations ![LAINOX bianco 500.png\]](https://support.lainox.com/hs-fs/hubfs/LAINOX%20bianco%20500.png?height=40&name=LAINOX%20bianco%20500.png) Open main navigation Close main navigation - - [English](https://support.lainox.com/en/knowledge/sapiens-how-to-resolve-error-message-a00-communication-alarm-with-base) - [Deutsch](https://support.lainox.com/de/knowledge/sapiens-wie-löst-man-das-problem-der-fehlermeldung-a00-alarm-kommunikation-mit-basisplatine) - [Español](https://support.lainox.com/es/knowledge/sapiens-cómo-resolver-un-mensaje-de-error-a00-alarma-de-comunicación-con-la-tarjeta-base) - [Français](https://support.lainox.com/fr/knowledge/sapiens-comment-résoudre-le-message-derreur-a00-alarme-communication-avec-carte-principale) - [Italiano](https://support.lainox.com/knowledge/support.lainox.com/knowledge/sapiens-come-risolvere-messaggio-errore-a00-allarme-comunicazione-con-base) English Show submenu for translations - [Go to Lainox.com](https://www.lainox.com/) [Go to Lainox.com](https://www.lainox.com/) Lainox Support - There are no suggestions because the search field is empty. 1. [Home](https://support.lainox.com/en/knowledge) 2. [Sapiens](https://support.lainox.com/en/knowledge/sapiens) 3. [Messages](https://support.lainox.com/en/knowledge/sapiens#messages) # Sapiens - How do you solve the error message “A00 communication alarm with base”? A00 warns that there is no communication between the Display board and the I/O board. As a consequence, the unit stops all functions and displays the message. **This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions.** ### Description The display receives power from the serial cable which also transmits the data. There are 2 possible scenarios, so either we are in the presence of a bad electrical connection or the Firmware of the I/O board and the software of the Display board are not aligned. ### Checks To restore operation, check: - Insertion of the serial cable on both boards. - Software version, update SW + FW - Try replacing the cable - Try replacing the I/O board - Replace the DisplayA00 warns that there is no communication between the Display and the I/O card. - [Naboo](https://support.lainox.com/en/knowledge/naboo#main-content) - [Installation](https://support.lainox.com/en/knowledge/naboo#installation) - [Use](https://support.lainox.com/en/knowledge/naboo#use) - [Messages](https://support.lainox.com/en/knowledge/naboo#messages) - [How to](https://support.lainox.com/en/knowledge/naboo#how-to) - [How it works](https://support.lainox.com/en/knowledge/naboo#how-it-works) - [Sapiens](https://support.lainox.com/en/knowledge/sapiens#main-content) - [Installation](https://support.lainox.com/en/knowledge/sapiens#installation) - [Use](https://support.lainox.com/en/knowledge/sapiens#use) - [Messages](https://support.lainox.com/en/knowledge/sapiens#messages) - [How to](https://support.lainox.com/en/knowledge/sapiens#how-to) - [How it works](https://support.lainox.com/en/knowledge/sapiens#how-it-works) - [Neo24hours](https://support.lainox.com/en/knowledge/neo24hours#main-content) - [Installation](https://support.lainox.com/en/knowledge/neo24hours#installation) - [Use](https://support.lainox.com/en/knowledge/neo24hours#use) - [Messages](https://support.lainox.com/en/knowledge/neo24hours#messages) - [How to](https://support.lainox.com/en/knowledge/neo24hours#how-to) - [How it works](https://support.lainox.com/en/knowledge/neo24hours#how-it-works) - [Oracle](https://support.lainox.com/en/knowledge/oracle#main-content) - [Installation](https://support.lainox.com/en/knowledge/oracle#installation) - [Use](https://support.lainox.com/en/knowledge/oracle#use) - [Messages](https://support.lainox.com/en/knowledge/oracle#messages) - [How to](https://support.lainox.com/en/knowledge/oracle#how-to) - [How it works](https://support.lainox.com/en/knowledge/oracle#how-it-works) - [Puff](https://support.lainox.com/en/knowledge/puff#main-content) - [Installation](https://support.lainox.com/en/knowledge/puff#installation) - [Use](https://support.lainox.com/en/knowledge/puff#use) - [Messages](https://support.lainox.com/en/knowledge/puff#messages) - [How to](https://support.lainox.com/en/knowledge/puff#how-to) - [How it works](https://support.lainox.com/en/knowledge/puff#how-it-works) - [Zoom](https://support.lainox.com/en/knowledge/zoom#main-content) - [Installation](https://support.lainox.com/en/knowledge/zoom#installation) - [Use](https://support.lainox.com/en/knowledge/zoom#use) - [Messages](https://support.lainox.com/en/knowledge/zoom#messages) - [How to](https://support.lainox.com/en/knowledge/zoom#how-to) - [How it works](https://support.lainox.com/en/knowledge/zoom#how-it-works) [![Chill listening crop-3](https://support.lainox.com/hs-fs/hubfs/LAINOX-1.png?width=88&height=24&name=LAINOX-1.png "Chill listening crop-3")](https://lainox.com/) Copyright © 2026, LAINOX Ali Group S.r.l. a Socio Unico