---
title: Interpret Flashing LEDs
slug: hardware/interpret-flashing-leds
docTags: 
createdAt: 2025-03-11T06:58:11.201Z
---

BrightSign players use LED flash sequences to indicate various types of errors. Flash sequences consist of a period of time in which the LED is off, followed by a number of equally spaced flashes, and then a return to the LED being off again. This sequence then repeats. The number of flashes indicates the error type.

Players with a single LED (e.g., LS, AU335) flash that LED rapidly during an OS update. This can be distinguished from an error code by the speed of the flashing - the flashes are too fast to count.

LED flash codes for each player model can be found at the links in the table below:

| **Model**                   | **Page**                                                   |
| --------------------------- | ---------------------------------------------------------- |
| **Series 6**                |                                                            |
| HD226, HD1026               | [HD6 Theory of Operation](docId\:iKObAHocWkgQ6yqLP4NIi)    |
| XD236, XD1036               | [XD6 Theory of Operation](docId\:WcVEm-_tZmrESnyglLYDo)    |
| XS6                         | [XS156 Theory of Operation](docId\:x_3SDgk9hPEWmOiWz194u)  |
| **Series 5**                |                                                            |
| XC2055, XC4055              | [XC5 Theory of Operation](docId:74NN2xoKX_YfdKCSZnKIE)     |
| XD235, XD1035               | [XD5 Theory of Operation](docId\:zisbrg3hhqtjFGXMMOe2n)    |
| XT245, XT1145, XT2145       | [XT5 Theory of Operation](docId\:C0P32JRlwg1F2eMJIMNjf)    |
| HD225, HD1025               | [XS156 Theory of Operation](docId\:x_3SDgk9hPEWmOiWz194u)  |
| LS425, LS445                | [LS5 Theory of Operation](docId\:WmN127TBf3QYb82_URgfo)    |
| AU335                       | [AU335 Theory of Operation](docId\:qyiVNq3NVKK5puoqr_ldI)  |
| **Series 4**                |                                                            |
| XT1144, XT244               | [XTx44 Theory of Operation](docId\:U8yTlQ0yhRlCqAOe_SxYa)  |
| XD1034, XD234               | [XDx34 Theory of Operation](docId\:ZjflJzJwFQqYuehQKon2g)  |
| HD1024, HD224               | [HDx24 Theory of Operation](docId:0MOYOE0b5Mzb1zcHIkm0N)   |
| LS424                       | [LS424 Theory of Operation](docId\:nMLq1EuUGLVkaDr8FE7H9)  |
| **Series 3**                |                                                            |
| XT1143, XT243               | [XTx43 Theory of Operation](docId\:h3HpGSMP2jQgumt1M61eG)  |
| XD1033, XD233               | [XDx33 Theory of Operation](docId\:xaESuW1QQJX6dPYtGoUVf)  |
| HD1023, HD223               | [HDx23 Theory of Operation](docId\:WI6SJ2c-jcFvwKuCBXKcC)  |
| LS423                       | [LS423 Theory of Operation](docId\:yiGPmlFQyFFVCzWendOP4)  |
| **Series 2**                |                                                            |
| 4K242, 4K1042, 4K1142       | [4Kx42 Theory of Operation](docId\:EF9vNjaJeOU851Rk1sjDL)  |
| XD232, XD1032, XD1132       | [XDx32 Theory of Operation](docId\:HTeL-xZjZ8PtDgOptmfmS)  |
| HD222, HD1022               | [HDx22 Theory of Operation](docId\:t2EoBQscSJ1x-8NvUSx-w)  |
| LS422, LS322                | [LSx22 Theory of Operation](docId\:bEM99w7AHVEE119Bll9aa)  |
| **Series 1**                |                                                            |
| XD230, XD1030, XD1230       | [XDx30 Theory of Operation](docId\:aWkX4JWAaYH1UEnJPi0JV)  |
| HD120, HD220, HD1020, AU320 | [HDx20 Theory of Operation](docId\:LvBqdsAraKcV7hOji_qLi)  |