I have a Philips magnavox 25"; tube tv (model #25T S52 C321)when turned on it has horizontal lines for about 5 minutes and then it goes to the picture and then the picture will frizzle every 10 to 15 seconds.
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If you have to replace one, they are very difficult to pull out and replace. You must do a convergence on the color of the tube you replace. You will be replacing a picture tube not a bulb. You may need to replace the fluid in the one tube. Or you may have a convergence problem. You need a TV tech to reveal that the problem is not a bad picture tube....which is rare in your case! Good Luck and thanks for asking!
Don't watches tv anymore or u will kill the tv CRTS tubes,will cost u more money to replaced the CRTS tv tubes than the problems u have right know.U have convergence problems,it dead.U have any soldering skill?Have solder iron,Solders,Solders wicks,Tries websites Tv repair world.com,Tv repairkits.com to buy a convergence kit to repair it ur self.The shop will cost U $300-$400 for parts and labors.
These TV's are known for polluted coolant in the picture tubes.The coolant is between the lense and the tube. The factory has a Service Bulletin about this problem and they say to change the coolant in each picture tube. This will make the TV look like it did when it was new.
It could be the flyback losing resistace in its windings. What is the chassis number I should have the service manual for it. Phillips/magnavox is hard to cross reference without the actual chassis number.
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.