You must contact your sales representative or the Telpo Q&A and Engineer Support to obtain the specific firmware and "download tool".
Issues with the motherboard or poor contact between internal components (like conductive rubber particles) can prevent the device from reading the FSK. How to Fix the "Hardware Error / No FSK Detected"
If the tamper sensor was triggered, the device often must be sent to a certified service center for "re-arming" and key injection. 4. Hardware Repair hardware error please download fsk again to fix it
Sometimes, a low battery causes the secure element to misfire. for at least 1–2 hours. Reboot the POS to see if the error clears. 2. Key Download via Admin Menu (If Accessible)
Store the device in a stable environment to prevent physical shocks that might trip the sensitive anti-tamper springs. You must contact your sales representative or the
Never attempt to open a payment terminal yourself, as it will trigger a security lockout.
The error message is a critical security warning typically seen on Android-based smart POS (Point of Sale) terminals, such as the Telpo TPS900 or the Kassatka-1F . In this context, FSK refers to the Financial Security Key (or specialized security firmware) that authenticates the device's payment processing hardware. Why This Error Happens Reboot the POS to see if the error clears
If the device still boots into the OS but shows the error in the payment app: Access the . Select Key Download or Import FSK .