Unit power up have sound but no picture.

I have a philips projection TV model 55pp9363h/17. Unit power up have sound but no picture. Three tube isn't lighting up. I change the flyback,horizontal output transitor but have the same problem. Fly back isn't oscillating. 15khz going to the horinzontal driver. Do you know what else could cause the unit from not oscillating. Thank you.

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Anonymous Dec 23, 2007

Still having problem with my projection PHILIPS 55PP9363. Have sound no picture.

I change flyback, change damper, unit remain the same. Need help.
Jason Potter Feb 17, 2008

I am having the same problem with my AKAI PT46DL10, no picture but I have sound, does this mean i need to replace the lamp
keithskustom Sep 01, 2008

I have a panasonic pt53wx53 and my wife was watching it and the picture went out. I have sound but thats it. Clueless about these things. Any help would be great ty

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My TV Akai PT46LP10 was playing then the picture disapere but not the sound. Green light is flashing when I put the power on and never stop flashing.

The sound is ok but no picture black screen only.

Thanks for your help

Nath

Posted on Jul 01, 2009

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Sometimes projection sets have 2 fuses one for audio and one for video if the one for video is blown replace it if it blows again after you turn it back on there is whole new problem if it wasnt the the flyback to begin with

Posted on Dec 06, 2007

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Lets see, This might be a shutdown circuit problem (protector resistor and capacitor are a part of this circuit). You may want to check if the Horizontal oscillator is working if not I would use something like the VA62A to do some signal subsitution. By providing horiz drive to the HOT you can see if the problem is in the HOT, the IHVT or if the problem is at the oscillator. This is a start. Since you replaced the IHVT and the HOT it looks like a possible oscillator problem. However you will not be to tell until you get a drive signal going into the HOT.

Posted on Sep 03, 2007

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Check the damper diode and the protection resistor in the High Voltage circuit. Good Luck.

Posted on Jun 19, 2007

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