When the TV key was pressed on the remote control the standby light of this set went green briefly and then returned to red, with no other obvious signs of life. Defeating the “power fail” system revealed that all the voltages from the power supply were present and correct, with 154V on the collector of the line output transistor 4TR33 (BU2508DF). As there was also plenty of line drive at the base of 4TR33 and no voltage at its emitter only one possibility remained, the transistor must be open circuit. This turned out to be the case, a replacement restoring normal results. This is an unusual failure, power transistors normally fail by becoming leaky or short circuit. [Beovision MX 4002]