Reply To: OSSC green led but nothing on the LCD display

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#63948
Morpheus_79
Participant

    Shall I check if the oscillator outputs the required frequency?

    Yes.

    The ‘display flashes + solid green led’ behaviour is somewhat similar to an OSSC without any firmware flashed onto it. I’ve seen similar behaviour on an OSSC with esd damaged flash memory… but since the op had nearly the same problem as you and fixed it by replacing the oscillator, it should be a better starting point. Especially since your OSSC sometimes works -> could be the oscillator delivering no stable clock.

    If the oscillator is fine: check the voltages on every voltage regulator too…