Question about Sony KP-46WT500 46" Rear Projection HDTV-Ready Television
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.
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,
Posted on Oct 26, 2007
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Posted on Jan 02, 2017
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