PreenFM > preenfm2 and preenfm3

Flashed or not flashed

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HJA:
Hello
So i just finished The unit but i just get a blue screen(did use a different screen).I bhought two off theese quite a while ago but only pcb and Preen F405.To be honest i cant even remember where i got them from.I suspect that the F405 hasnt been flashed .Is there a way to find out ?

Xavier:

Hi,

If the screen is full of squares after the leds flashed, then the problem comes from the USB Stick. It's flashed.
You can check by hodling down a button while powering on you preenfm2. It should enter bootloader mode.

To flash it if needed :
http://ixox.fr/preenfm2/build-it/burn-firmware/
Or there are recent tools to flash using DFU on st webstite.

HJA:
Na
Just blue backlite nothing else .
So i guess i will have to go thrugh the process of flashing it.
I am a bit rusty on my computer skills.

Thanks

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