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Sony KP57HW40 8 blinks    
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Joined: 28 Feb 2010
Posts: 2
Location: Toronto, Ontario

PostPosted: Sun Feb 28, 2010 11:55 am    Post subject: Sony KP57HW40 8 blinks Reply with quote


I recently got this sony 57" RP with hopes of fixing it. I have the service manual, and it says that 8 blinks means HV error.

When i turn it on, the blue crt comes on within 1 second, and the other 2 fade in slowly coming to full power after 6 seconds or so. I sometimes get a brief (0.5 second) shot of white noise from the speakers. Right as the red and green crts come up to brightness, it shuts down and gives the 8 blink code.

Most people on the 'net seem to suggest either adjusting the guns with the pots behind the grille to bring the voltage down a touch. No dice. Hope i didnt break anything by messing with them. :/

I was wondering if there's any more troubleshooting or testing i can do before ordering a new flyback, or HV distribution block.

I'm no TV tech, but I know my way around circuits and have DMMs and scopes and such.

Thanks for your help

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Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS

PostPosted: Sun Feb 28, 2010 3:58 pm    Post subject: Reply with quote

something is wrong with the blue CRT. it's not supposed to come on by itself like that.

check the circuit that is driving it.
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