I did this when I was a teenager - with CRT monitors. Higher voltages and I had the fun of refocusing the tube and fixing the colour registration while it was o

I did this when I was a teenager - with CRT monitors. Higher voltages and I had the fun of refocusing the tube and fixing the colour registration while it was on, reaching around the back while I looked at my test pattern. I learnt a lot about computing hardware and software on that Pentium box: 166 MMX (overclocked to 200MHz), 16MB RAM (later 64MB), running Debian and my resurrected 15” LG CRT. Oh, and a 56kbps modem.