diff --git a/site/docs/hardware/dell9020.md b/site/docs/hardware/dell9020.md
index 2825ab8..51ea9ea 100644
--- a/site/docs/hardware/dell9020.md
+++ b/site/docs/hardware/dell9020.md
@@ -48,7 +48,7 @@ P*: Partially works with blobs
 
 | ***Features***                                    |    |
 |---------------------------------------------------|----|
-| **Internal flashing with original boot firmware** | ?  |
+| **Internal flashing with original boot firmware** | W+ |
 | **Display (if Intel GPU)**                        | W+ |
 | **Display (discrete CPU, SeaBIOS payload only)**  | W* |
 | **Audio**                                         | W+ |
@@ -206,6 +206,21 @@ Flash a ROM image (software)
 If you're already running Libreboot, and you don't have flash protection
 turned on, [internal flashing](../install/) is possible.
 
+Internal flashing can also be done with the original Dell BIOS, if the
+SERVICE_MODE jumper near the PCIe slots is removed. Before flashing,
+
+	rmmod spi-intel-platform
+
+needs to be run to prevent errors. Once Libreboot is installed, the
+SERVICE_MODE jumper can be replaced.
+
+**Note: The Dell BIOS can write EFI variables to flash when shutting
+down, which could corrupt the newly flashed Libreboot ROM and render
+the system unusable. To prevent this, after flashing internally from
+the original Dell BIOS, remove power from the computer instead of
+shutting it down normally. It's recommended to use a live USB instead
+of the internal drive to prevent potential filesystem corruption.**
+
 Flash a ROM image (hardware)
 -----------------