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Topics - IvanoFM

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PreenFM2 / PreenFm2 wont start and display problems
« on: March 14, 2019, 09:38:30 AM »
Hi all,

thank you for accepting me on this forum, I'm glad to join preenFM community =)

So I've finished my build of preenFm2 kit, I bought it on TubeOhm.
I connect it via usb to pc, and seems working fine display is functiong, buttons and encoders work and my pc even recognize preen fm2 as connected device.

After that all seems working fine, i turn it off, to build the case around it and finish the build. But now as I connect it again to the pc not only my pc wont recognize it as device but preenfm2 screen is black. The 4leds flash rapidly then display remain black.
Not knowing what to do and that Jmp3 might be a problem, i try to connected the 2 jmp3 pins together, note that before this action they where not connected for the whole time, as if I'm correct should be, and turn it on again. Then remove the connection from 2 jmp3 pin and try again, nothing screen black again.
I thought it was a display problem, so I disconnected it checked the header for pin shortage, but was all good, and connected it again and then turn on the preenfm2.
Seems to work, the display is lit and I can navigate menu. But then as I was trying to load a bank by pressing menu button, the writing on the display become all strange and unreadable(strange symbols/or partially readable letters).
Turn it off and on again, menu fine try to navigate same thing happens. Turn it off and on again this time black display...This thing repeat randomly each time i turn it on. I also seem to hear a high pitch noise when I connect the audio jack to headphones or speakers, that is display noise problem I read somewhere, am I right?

What's happening to my build? I was so happy that it seemed to work on first try =(

Thank you in advance for helping me

Ivano

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