diff --git a/src/hw/zotino_fastino.md b/src/hw/zotino_fastino.md
index 5263c0b..1f47b8d 100644
--- a/src/hw/zotino_fastino.md
+++ b/src/hw/zotino_fastino.md
@@ -55,4 +55,20 @@ Press ENTER when done.
 ### High-freq audible noise and output values all near -0.1 on Zotino v1.4.2
 
 This may happen when power-cycle is too short. Power down the crate, wait at least 30 seconds, and power up again.
-[Issue](https://github.com/sinara-hw/Zotino/issues/37).
\ No newline at end of file
+[Issue](https://github.com/sinara-hw/Zotino/issues/37).
+
+### Zero voltage output on Fastino
+
+Some Fastino may not output any voltage during testing, usually that means it has no gateware.
+
+Another common symptom of no gateware is that no LEDs are lit up. Whereas if the gateware has been flashed, the PG and FD LEDs will be lit green.
+
+You can flash the gateware with a standalone Kasli/Kasli-SoC:
+
+1. Download the latest `fastino.bin` release from [quartiq/fastino](https://github.com/quartiq/fastino/releases)
+2. Run `git clone https://github.com/quartiq/kasli-i2c.git` and place `fastino.bin` in the kasli-i2c directory
+2. Connect the Fastino's EEM0 to any available Kasli/Kasli-SoC EEM port (**do not hot-plug**)
+3. Power on the standalone Kasli/Kasli-SoC
+4. Run `nix-shell -p python311Packages.pyftdi`
+5. Run `cd kasli-i2c; python flash_fastino.py 0 EEM<number> write fastino.bin` where `<number>` is the EEM port number on the Kasli/Kasli-SoC side
+6. If PG and FD LEDs are lit green, the Fastino is ready.