Question about Sony KP-46WT500 46" Rear Projection HDTV-Ready Television

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Sony Big Screen TV Not Powering On

Upon hitting the power button, the Power/Standby light blinks 8 times. During this time, I hear audio for about 5-8 seconds, then the tv shuts off. The Power/standby light continues to blink 8 times, pausing, and then repeating.

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Re: Sony Big Screen TV Not Powering On

This looks like a problem with the High Voltage or switching power supply section of the TV set. What you need to do is to measure the voltage from the HV transformer to the Anodes of the CRTs with a high voltage probe, and check the voltage output of the switching power supply. What may have happened is a component may have shorted out causing an over-current condition with is triggering the shutdown circuit (These are the relays you are hearing). I would check the Horizontal Output transistor, and the components in that section of the TV.

In addition check the voltage test points on the HV / Horizontal and switching power supply board. This will determine if the section is working or not (most likely not). Make sure you have a schematic, and multimeter and a high voltage probe.
I hope this helps,
Thank you,

Posted on Oct 26, 2007

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TV turns red,shuts off, stand-by light blinking 8Times

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I have a 51 in. Sony model kp-51ws520. when I turn tv on I get sound by no picture. Standby light blinks 5 times then shuts off . If I power it back on, sound no picture then standby blinks 10 times after...

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Diagnosis item
Number of blinks
Supposed malfunction Condition
screen display,
Diagnosis item: Results
•Power not ON 0
[Standby Power Supply System]
F601 open.
R607 open.
Q601 short circuit
[Main Power Supply System]
IC601 and R612 are broken.
VDR601 short-circuit
Cannot turn on the power.
LED doesn't blink.
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R672 open.
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3 : +B OVP 000
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IC1509(V out) is broken.
Q1505(V Pulse Buffer) is broken.
Raster goes to one line horizontally, Aand then video
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4 : V Stop 000
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Video out, Q705, 732, 761 and others in C board
Q218, 219, 220 (A board)
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and then blinks for the self diagnosis.
5 : AKB 000
Horizontal deflection stop 6 times
C515, 516 open.
IC206(YC Jungle) is broken.
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It is very common that the fly-back and high voltage multiplier and also the horizontal output stage fails in these sets. Along with it, the power supply will usually require to be serviced. On rare occasions, the vertical deflection amp fails.

Jerry G.

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Replacement part
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