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

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Light blinking...but not coming on

Hello, I have the sony model KP-46WT50C(?) or KP-46WT500 (last digit/alphabet is illegible). Every time I try to power it on, it makes a clicking noise as if it is turning on, but I never get a picture nor any sound. I've noticed the red timer light that blinks on and off, but I do not know what it means. Please help. I haven't had the television 2 years

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This looks like a problem with the H 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,
Shuttle83

Posted on Oct 26, 2007

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