Q X7 Not Turning on, noise from speaker. NO DFU

Hardware help and support for the FrSky Taranis
Post Reply
Jortug
Posts: 3
Joined: Thu Jan 30, 2020 9:11 pm
Country: -

Q X7 Not Turning on, noise from speaker. NO DFU

Post by Jortug » Thu Jan 30, 2020 9:25 pm

Hi! i'm new to the hobby and i bought a QX 7 transmitter, i was using fine until a day i tried putting a SD card, it booted up fine, there was voice sound when starting up, then i went and changed the volume of the speaker and turned off.

After that i tried turning on there is nothing, no screen turning on, no DFU mode holding the trim buttons, just a noise on the speaker when i press power button or when i plug the usb cable, my computer won't show or even recognize the transmitter or the STM32 chip. I Tried with and without SD card, tried new sd card, tried the TXcompanion to flash, even STM32 bootloader flash but it doesn't find the device. I tried on 3 windows machines and a mac, nothing! Tried multiple USB cables too!

Here is the video of the problem: https://youtu.be/R5oI4Va5SmI

Here is what i tried:
Removed the ClockBattery inside
Tried other Batteries,
Tried with other and without sd card.
Opened checked for any sign of burnt component.
Entered in contact with frsky, but none of the bootloader Brick fixes worked.

I tested other stm32microcontrolelrs that i have and my computer recongize without a problem.

I don't know what to do anymore, is there a way to fix this? can i flash the stm32 chip directly?


User avatar
jhsa
Posts: 19330
Joined: Tue Dec 27, 2011 5:13 pm
Country: Germany

Re: Q X7 Not Turning on, noise from speaker. NO DFU

Post by jhsa » Thu Jan 30, 2020 10:02 pm

Another one bite the dust :(

Is the processor getting too hot to the touch when you keep the power button pressed?

João
My er9x/Ersky9x/eepskye Video Tutorials
https://www.youtube.com/playlist?list=PL5uJhoD7sAKidZmkhMpYpp_qcuIqJXhb9

Donate to Er9x/Ersky9x:
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=YHX43JR3J7XGW

Jortug
Posts: 3
Joined: Thu Jan 30, 2020 9:11 pm
Country: -

Re: Q X7 Not Turning on, noise from speaker. NO DFU

Post by Jortug » Fri Jan 31, 2020 2:28 pm

jhsa wrote:
Thu Jan 30, 2020 10:02 pm
Another one bite the dust :(

Is the processor getting too hot to the touch when you keep the power button pressed?

João
No not at all. is there a pin that i can check if the MCU is getting power?

Jortug
Posts: 3
Joined: Thu Jan 30, 2020 9:11 pm
Country: -

Re: Q X7 Not Turning on, noise from speaker. NO DFU

Post by Jortug » Wed Feb 05, 2020 4:34 pm

I tried to flash with ST-link, it connects succesfully to the MCU but when programing and verify it generates this error, and comparing the file of the firmware with the MCU some of the blocks are different and still no sign of life of the QX7 powering on.

Image
Image

User avatar
MikeB
9x Developer
Posts: 17106
Joined: Tue Dec 27, 2011 1:24 pm
Country: -
Location: Poole, Dorset, UK

Re: Q X7 Not Turning on, noise from speaker. NO DFU

Post by MikeB » Wed Feb 05, 2020 5:17 pm

You have a bit in a particular column of the flash memory that appears to always be reading as a '1'. This strongly suggests a processor failure. If it is a recent purchase, I would suggest this is due a warranty replacement.

Mike
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!


Post Reply

Return to “FrSky Taranis radio”