Another neat solution to a tricky problem.Some years ago I bought a good-spec, low-cost monitor featuring S-IPS screen technology with a wide color range. Even though I only use this 4:3 aspect display as my second, backup monitor I was slightly dismayed when it recently began behaving oddly, indicating that it may be on its last legs. After switch-on the display brightness began to pulse up and down at regular intervals and even the on/off switch (!) backlight illumination began flickering at the same rate until the circuit warmed up. At first the brightness fluctuations only occurred immediately at switch-on and lasted for about a minute, but as the days went on these periods of flickering lasted longer and longer.