NewHome › Forums › OSSC, OSSC Pro and DExx-vd isl › OSSC – DIY & Repair Support › v.1.7 not working even after JTAG flashing; how to debug? › Reply To: v.1.7 not working even after JTAG flashing; how to debug?
is it expected for the firmware to not print anything on the LCD?
The firmware is able to print out “init error” messages on the LCD if some of the ICs are not responding:
But not for every IC… and only if they are not responding. An IC causing a short on one of the power rails may result in a more unpredictable behaviour. But still: no output at all on the LCD is (at least) strange. I’ve seen a case of a broken oscillator and another case of a broken flash memory causing it… but i’ve never seen a broken audio ADC as the culprit.
You may simply try to remove U8… to see, if the short is gone… and to check, if U6 outputs 3.3V without it. You may get the LCD output back without it – but if you don’t, there may be something else damaged too.
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