# My Pixhawk does not come up !§$%&/? **URL:** \ **Category:** Uncategorized\ **Created:** [April 9, 2019, 2:18pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379 "2019-04-09T14:18:38Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 9, 2019, 2:18pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/1 "2019-04-09T14:18:38Z")
Please Help, i have a pixhawk 2.1 and after try to firmware upgrade, the pixhawk only blink red and there is no reaction in /dev/ttyACM0 i use qgc and have no idea. Any ideas? ---
**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\ **Post date:** [April 10, 2019, 9:43am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/2 "2019-04-10T09:43:42Z")
What firmware did you flash? And can you try to upgrade again in QGC? Blinking red usually means it is in bootloader mode because there is no firmware flashed. ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 10:11am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/3 "2019-04-10T10:11:42Z")
The German Log is a problem for you? ## QGroundControl kann die Firmware auf Pixhawk Geräten, SiK Radios und PX4 Flow Smart Kameras aktualisieren. Alle QGroundControl Verbindungen zu Fahrzeugen müssen disconnected prior to firmware upgrade. Please unplug your Pixhawk and/or Radio from USB. Plug in your device via USB to start firmware upgrade. Gerät gefunden: PX4 FMU V2 Verbunden mit Bootloader: Version: 5 Board ID: 255 Flash Grösse: 2080768 Firmware wird heruntergeladen… Von: [http://px4-travis.s3.amazonaws.com/Firmware/stable/px4fmu-v3\_default.px4](http://px4-travis.s3.amazonaws.com/Firmware/stable/px4fmu-v3_default.px4) Herunterladen abgeschlossen MAV\_AUTOPILOT = 12 Erfolgreich entpackt parameter\_xml Erfolgreich entpackt airframe\_xml Erfolgreich entpackt image Erasing previous program… Erase complete Programming new version… Error: Brennen fehlgeschlagen: Befehl fehlgeschlagen: 0X13 (PROTO\_INVALID) bei Adresse 0x00000000 Verbesserungen abgebrochen ---
**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\ **Post date:** [April 10, 2019, 11:08am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/4 "2019-04-10T11:08:17Z")
Deutsch passt auch 🙂 Ok, so the flashing fails, that’s odd. Can you try to flash px4fmu-v2\_default? I suppose you can’t actually choose, so that doesn’t work… 🤔. And which QGC version are you using? ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 11:25am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/5 "2019-04-10T11:25:22Z")
Thank you, How can i read this info? ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 11:30am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/6 "2019-04-10T11:30:26Z")
I have also the possibility for Mission Planner. But there i have weniger experience. 🙂 ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 11:34am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/7 "2019-04-10T11:34:35Z")
Mission Planner V1.3.64 ---
**Author:** ![JulianOes](https://discuss.px4.io/user_avatar/discuss.px4.io/julianoes/32/30_2.png) [@JulianOes](https://discuss.px4.io/u/JulianOes)\ **Post date:** [April 10, 2019, 12:20pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/8 "2019-04-10T12:20:26Z")
And it doesn’t work with Mission Planner and neither QGroundControl? ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 12:27pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/9 "2019-04-10T12:27:49Z")
I try it with MP and QGC. No success. Can i give you some more infos? ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 12:31pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/10 "2019-04-10T12:31:54Z")
The speed of flashing with qgc is to fast for my thinking. ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 2:26pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/11 "2019-04-10T14:26:07Z")
The Mission Planner works. I have upload the firmware for ardupilot, i think. Like the painless 360 descript. QGC has the same problem like before, no reaction. I beleave i have installed the Chibios and ardupilot. The behavior from qgc while calibration looks strange then used to be with PX4. The error like above is the same after trying new firmware upload. ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 3:38pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/12 "2019-04-10T15:38:59Z")
Now is installed: Arduplane V3.9.7 ChibiOS fmu v3 . ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 3:39pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/13 "2019-04-10T15:39:29Z")
And now i find the following discussion: > **[How to get back to NuttX](https://discuss.ardupilot.org/t/how-to-get-back-to-nuttx/28495/5)** > > Hi Micheal, I am having a problem rolling back firmware versions. I accidentally installed ChibiOS (for Arduplane) and need to revert back, but keep getting an error when trying to load previous firmware versions. I keep getting an upload failed... ---
**Author:** ![smilie](https://discuss.px4.io/letter_avatar_proxy/v4/letter/s/439d5e/32.png) [@smilie](https://discuss.px4.io/u/smilie)\ **Post date:** [April 10, 2019, 6:14pm UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/14 "2019-04-10T18:14:53Z")
Mission Planner works for firmware, but QGC does not. Is there a idea for beginners? ---
**Author:** ![auturgy](https://discuss.px4.io/letter_avatar_proxy/v4/letter/a/e480ec/32.png) [@auturgy](https://discuss.px4.io/u/auturgy)\ **Post date:** [April 11, 2019, 2:39am UTC](https://discuss.px4.io/t/my-pixhawk-does-not-come-up/10379/15 "2019-04-11T02:39:00Z")
My guess here is that Hex is using a new bootloader which is not yet recognised by QGC in a stable build. See [https://github.com/mavlink/qgroundcontrol/pull/7319](https://github.com/mavlink/qgroundcontrol/pull/7319) A daily build of QGC should work.