Question about Philips 21PT4475 TV

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No raster, No sound

Model of the phillips tv x04636 21'' wooden was not found on line, i used the above to pass over my problem to you experts to help find a solution. the screen of my tv lights with no raster and sound. the channel display is also off. where does the problem lie. eargall waiting for you troubleshooting guide. best regards, sam wepukhulu

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Your problem discription is not very detailed but certainly it sounds like the first place to look would be at the fuses if the set is completely dead. Good luck.

Posted on Jun 23, 2006

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Posted on Jan 02, 2017

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When tv is powered on tv only displaying channel number and sound -no raster. using video mode displays are ok. sound is also ok


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
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There is no raster to your TV I assumes. If the LED drive inverter board has damaged, there will be no back light, and so no picture. If sound is OK, suspect the inverter board. Check this for more details.

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Hi Sikandar,
Let me know how many times red led blinks as there would be an interval of 3 seconds so count blinks from pause to pause.
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No power indication,no rasters,and no sound. Only click sound.


Go to the Anantek website and search for your TV or similar TV's to see if anyone has posted repair hints. I've fixed several TV's and other electronic equipment from their website.

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High pitch buzzing.


Hi there
Let's make ur problem a bit clear. "white lines" how? where?
meaning retrace lines with full raster or a single vertical line?
buzzing sound? without even turning the power switch of the TV to "ON" or when u just plug the power cord?
I'll check for schema, mean while can u tell me where the resistor leads to? is it a fusible resistor? if so , to which area the resistor suppliers power?
Regards
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Please CLICK HERE and once you are at the site enter your model no.

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No raster, no sound in my big phillips TV


That unit is a PTV916 chassis. The oscilating sound you hear is probably a feedback pulse on the secondary transformer. That would first make me suspect that the HOT (Q802 / 2SD1556)(horizontal output transistor) has shorted. You need to check for any short between the base and emitter pins of that component. If that's the problem properly replacing it should restore normal operation. If that wasn't it, you would next check for failer of the SSB located on the left side of the unit next to the tuner, mounted vertical. That board has been a problem in many of the PTV9xx series chassis. It can be rebuilt, but will take some extensive knowledge and equipment to test. If any of this sounds too complicated I strongly suggest a qualified shop do the testing and repairs. If you have any difficulty locating a reputable shop try contacting NESDA (National Electronic Service Dealer's Assn.) for a listing of shops in your area. It is worth repairing. Good Luck Bill

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Phillips/Magnavox 9P5544C102 white raster and shuts down


This denotes a problem called blooming the horizontal lines you see are called retrace lines this is caused by the increase in anode voltage which could be caused by an increase in HV section current which trips the overcurrent protection dircuit and turns the TV off.If you do not have electronics experience I would suggest taking the set to a TV repair shop.

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3 Answers

No raster, No sound, No channel number


wepu, Buddy it sounds like you got a power supply problem. As you say the picture is all blue?? With no video or sound and the fact that the channel display is out is the first indication that i would guess this. Do you still have the owners manual that you got when you first got the set? Good, cause thats the only place i can think of where to look in case of service over in your part of the world as I did try!! Man I tryed but to no avail. No one has heard of this model but that dosent mean that it dos'ent exsit!.. If your a tech or know your way around solid state circuitry then you should have no problem finding the fault once you get a service manual from the service location in your owners manual. Now if your not a tech and a handy man ?? If I were you I wouldnt mess with the tv as theres over 25000 volts inside the set and i've seen it make a grown man cry. Man dont attempt the repair or troubleshooting if you dont have the right or proper tools and equipment!!! Good Luck

May 26, 2006 | Philips 21PT4475 TV

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