According to the failure phenomenon analysis of the fault in the electronic search like line scan circuit or high voltage circuits. Just minutes after power on the failure phenomenon, analysis may be a viewfinder element electric heat soft breakdown. When failure occurs with a multimeter to check IC701 / AN2510S feet of voltage, essentially normal. Using oscilloscope to observe IC701} {20 feet 5 Vp - p line drive pulse signal waveform is normal, along the circuit to check the buffer tube Q701 emitter output line drive pulse signal waveform amplitude only 0.5 Vp - p, normal should be 2 Vp - p, Q701 don't work properly. With a multimeter to check Q701 each foot of voltage, measure the VB 3.2 V, Ve, Vc is 0 to 1 V V, normal VB 4 V, Vc, Ve should be 2.3 V should be 0 V. Check resistance R717, coupling capacitance C711 normal, soft breakdown Q701 are, replace Q701/2 sb1218 electronic search like the display back to normal.NE2service manual download site