obuing Posted May 4, 2016 Share Posted May 4, 2016 Fixing video issues Quote Link to comment Share on other sites More sharing options...
obuing Posted May 4, 2016 Author Share Posted May 4, 2016 I have a second hand 400 that lights up with power but no pic or sound. What should I look for? Quote Link to comment Share on other sites More sharing options...
BillC Posted May 6, 2016 Share Posted May 6, 2016 I have a second hand 400 that lights up with power but no pic or sound. What should I look for? The LED on the 400/800 is powered by the -5VDC supply, regulated by a zener diode. You can check if the +5V and +12V supplies are functional on the SIO socket, pins 10 & 12, +12V only applies to the 400/800. This lets you check the voltages without actually opening the case. Quote Link to comment Share on other sites More sharing options...
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