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#spectrum48k

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The #Sinclair #Spectrum48k needs more attention as I thought. After 5 mins of running it crashed. After repower it shows white vertical lines. Also I have replaced TR4 and TR5. But it seems one of the 4116 shorts the -5V (-2V) and +12V (+8V) voltage down. Fast turn off for rescueing TR4/5. Next step is a complete low RAM change with sockets 🤔​ Nothing really new for me.
Btw. it is an issue 2 board with a crispy sharp picture after vid mod. And someone "worked" on it before, PIN20 of the ULA was bent upwards and not in socket.
#RetroComputing