Question about Sony KV-27S36 27" TV

2 Answers

No Picture, Sound Fine

Suddenly I lost the picture. Sound is fine. The remote changes channel and seems to work correctly. On TV the 'Standby/Timer light is flashing. Nothing on the remote seems to get the picture back. I would appreciate any suggestions. John Carson

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  • Kennard Dec 17, 2007

    Two loss of picture conditions observed when Sony KV-27S36 is turned on :



    1) Good full Picture on for approximately 2 seconds, then for 1 second the top 1/2 of raster is visible on screen, then dim full screen for 1 second, then dark screen. TV Channel sound is heard. After this condition there is NO blinking light.



    2) When TV is turn on initially there is a dark screen. TV Channel sound is heard. Light is blinking continuously.



    Diagnosis:
    A) Checked for cold solder joints and touched up any that looked questionable. All looked very good. No change in loss of picture.



    B) Confirmed voltage on G board CN641 at pin 1 is 135 Vdc. Did not change during start up or after a few minutes.



    I would appreciate any suggestions to fix this problem. Jim

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Check the connection at the back between the mainboard and CRT board or small tube board! It have 1 missing voltage 200v (or screen adjustment) check all resistors in G2!

Posted on Feb 14, 2010

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Hey John, How many times does the light blink? No blinks - Problem in the standby power section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should show open). Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective. One blink - not used for the self-diagnosis Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits. Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672. Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505 Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the Cboard, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly. Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206. Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits. Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some newer models of Sony TV sets, this code means that T8005 is defective on the D board. Nine blinks - Replace D 6116 and D 6301 on the "G" board, do not resolder as this will fix the problem temporary. Or Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing, then change the switching regulator on the "G" board or check connections. Make sure the regulator is -12 or -13 (negitive). Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the " D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board. I suggest you do a hard reset. Unplug the power cord for 4 hours. Then plug it back in and check it. If it works, great. It not, cost of repair for this is usually around $150 - $250 plus the house call.

Posted on Jun 26, 2007

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