diff --git a/docs/interfaces/hmm/leds.md b/docs/interfaces/hmm/leds.md
index b256b82..1c80cb3 100644
--- a/docs/interfaces/hmm/leds.md
+++ b/docs/interfaces/hmm/leds.md
@@ -11,7 +11,10 @@ This platform has four red, green and yellow light-emitting diodes (LEDs).
 
 LEDs are used to indicate [system flashing](../../system/update.md).
 
-LED 1 will be yellow when entering u-boot and green when leaving. The same LED is then set up with a heartbeat trigger from device tree and blink in green light to indicate that the system is running.
+LED 1 will be yellow when entering u-boot and green when leaving. The same LED is then set up with a heartbeat trigger
+from device tree and blink in green light to indicate that the system is running.
+After that point, any application running on the device may take over and change the behavior of the LEDs.
+If your product comes with customer specific software, see the dedicated software manual companion for the specific LED matrix.
 
 ### The following LEDs are available
 
@@ -28,7 +31,7 @@ LED 1 will be yellow when entering u-boot and green when leaving. The same LED i
 
 
 ### Default front
-Overlay illustration (HM020-003711, HM020-010411)
+Overlay illustration (HM020-\*\*\*W11, HM020-\*\*\*W21)
 
  - 🟢 D
  - 🟢 C 
@@ -37,15 +40,15 @@ Overlay illustration (HM020-003711, HM020-010411)
 
 ### System built in modes
 
-| Stage                             | LED 4 (Top) | LED 3 | LED 2 | LED 1 (Bottom)     |
-|-----------------------------------|------------|-------|-------|---------------------|
-| **Power On**                      | 🟡         | 🟡    | 🟡    | 🟡                |
-| **Booting U-Boot**                | ⚫         | ⚫    | ⚫    | 🟡                |
-| **Bootscript(load bootfs)**       | ⚫         | ⚫    | ⚫    | ⚫                |
-| **Flashing Mode(initial USB*)**   | ⚫         | ⚫    | ⚫    | ⚫                |
-| **File Load OK**                  | ⚫         | 🟢    | ⚫    | ⚫                |
-| **File Load Fail(USB*)**          | ⚫         | 🔴    | ⚫    | ⚫                |
-| **Flash Success**                 | 🟢         | 🟢    | ⚫    | ⚫                |
-| **Booting Linux**                 |            |        | ⚫    | 🟢                |
-| **Linux Running**                 | ⚫         | ⚫    | ⚫    | 🟢/⚫(blinking)  |
- - *USB= Flashing with USB memory stick
+| Stage                             | LED D (Top) | LED C | LED B | LED A (Bottom)     |
+|-----------------------------------|-------------|-------|-------|--------------------|
+| **Power On**                      | 🟡          | 🟡    | 🟡    | 🟡                 |
+| **Booting U-Boot**                | ⚫          | ⚫    | ⚫    | 🟡                 |
+| **Bootscript(load bootfs)**       | ⚫          | ⚫    | ⚫    | ⚫                 |
+| **Flashing Mode(initial USB*)**   | ⚫          | ⚫    | ⚫    | ⚫                 |
+| **File Load OK**                  | ⚫          | 🟢    | ⚫    | ⚫                 |
+| **File Load Fail(USB*)**          | ⚫          | 🔴    | ⚫    | ⚫                 |
+| **Flash Success**                 | 🟢          | 🟢    | ⚫    | ⚫                 |
+| **Booting Linux**                 |             |       | ⚫    | 🟢                 |
+| **Linux Running**                 | ⚫          | ⚫    | ⚫    | 🟢/⚫(blinking)    |
+ - *USB= Flashing with USB flash drive
diff --git a/docs/system/hmm/update.md b/docs/system/hmm/update.md
index b3f1a8b..00c4f06 100644
--- a/docs/system/hmm/update.md
+++ b/docs/system/hmm/update.md
@@ -11,14 +11,14 @@ tags:
 ### Prepare upgrade
 
 * Rename the file `***-image-verdin-am62-hmm.wic.gz` to `hmm-image.wic.gz`
-* Copy `hmm_boot.scr` and `hmm-image.wic.gz` to a USB memory.
+* Copy `hmm_boot.scr` and `hmm-image.wic.gz` to a USB flash drive.
 * It is also possible to update by copying `hmm-image.wic.gz` to `/boot` or  `/`  on the Linux file system
 
 ### If the USB method is used
 
-* Plug the USB memory into the HMM
-* Press and release the the `RESET` button 
-* You can add an [autoboot.sh](../update.md#usb-method-autobootsh) script to the USB memory on the first boot after flash to perform post installation.
+* Plug the USB drive into the HMM
+* Press and release the the `RESET` button
+* You can add an [autoboot.sh](../update.md#usb-method-autobootsh) script to the USB drive on the first boot after flash to perform post installation.
 
 ### If /boot method is used
 
@@ -30,7 +30,7 @@ tags:
 
 * The unit shall now set LED 4 (D) to green if it was successful in writing the wic.gz file or red for 10 seconds before reset.
 
-***NOTE*** Detailed LED behavior can be found [here](../interfaces/hmm/leds.md
+***NOTE*** Detailed LED behavior can be found [here](../interfaces/hmm/leds.md).
 
 
 
@@ -42,4 +42,4 @@ ssh dut reboot
 ```
 ### Update u-boot and spl
 
-  TODO description for a /opt/hm/boot_flash.sh script.
\ No newline at end of file
+  TODO description for a /opt/hm/boot_flash.sh script.