Question about GE 31GT740 31" TV

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27gt722 sound ok, no video

Model:27gt722 chassis: cte-203ad5 sound ok, no video. it does not illuminate filament CRT

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I found one of these that had an inductor coil which is in series with the hoizontal output transistor base open up. It had a bad solder connection where it goes through the circuit board. This might be what happened to your tv. If so, it needs to be resoldered. What happens is that you loose horizontal drive and since the voltage that lights the filiament of the picture tube is derived from the flyback transformer this voltage is gone. Another possibility is that you may have an opem filiament (rare) or a loose connection on the picture tube driver board which is mounted on the neck of the tube. Stargazer

Posted on Mar 03, 2007

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Posted on Jan 02, 2017

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In Samsung tv complaint<br/>in first time tv working in normal and after sometime picture is blinking and slowly no pictre. that time sound is also ok.<br/>after that am am change the capa


Check its solder terminal at the CRT board [Filament voltage]. It sounds like the filament do not glow after some time due to a loose contact at the CRT base connector sockets. Check it.
http://electronicshelponline.blogspot.com/
If this does not help, check the ABL circuit for any open resistor.

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possible no filament lit in the neck of the picture tube (there are 3 and not real bright as source is only 6.3 volts.

Possible no High voltage but most that have sound have high voltage.

You are going to have to remove rear cover to LOOK--be careful and let me know what you find, if no filaments are lit it will be a easy fix and should be easy to find---if no filaments let me know.

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Need Operators Manual for GE 27GT722


Found a manual online and that described the situation. Thanks.

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IM A TV TECH. I HAVE A SONY LCD KP-60XBR800 I HAVE NO RASTER. POWER OK, MENU OK BUT NO RASTER ON TUNER, TUNER VOLTS OK,CAN YOU HELP ME PLEASE. THANKS my email sergioaguirre0182@hotmail.com


check the high voltage with the screen control turned up high where there is no raster. suspect problem within the video circuit where there is no high voltage or defective picture tube.some time when the screen is black and the screen control advanced,you can see if the tv has video or vertical or horizontal problems on the screen.service the high voltage circuit if there is no raster or high voltage is seen.no raster can be caused by the no heater or filament in the CRT.---- a defective picture tube can cause many problems, such as, poor brightness ,missing colors,intermittent picture,poor focus,a single-colored raster,arching in the gun assembly,retrace lines in the picture,negative picture,chassis shutdown,noheater or filament lit and no raster to name a few.an open filament or heater can cause no picture or no raster symptom.a defective CRT can have an extremely bright screen.loose particles of the cathode element can lodge between the grids and cause an intermittent black and white picture. simply tap the ends of the CRT gun assembly and notice if the picture begins to flash off and on.---- with a leaky picture tube after turn on the raster dims and get extremely bright.a dim picture with no green in the raster can result from a bad green assembly. a heater-to-cathode short can cause a raster to change colour or a result in no raster at all.replace the picture tube if there is severe arching in the neck of CRT. excessive brightness with retrace lines and a vertical collapse to a thin line can be caused by a bad coil on the neck board of the picture tube.rejuvenate the picture tube when there is very bright green screen. check for the resistance change on the resistors of the CRT neck board for an excessively bright picture with retrace lines.excessive dust inside the CRT spark gaps within the picture tube socket can cause the very bright raster and the chassis shutdown.a defective video amp,luminance buffer,or reference transistor can cause a bright picture with retrace lines. -------- for getting any required parts to replace you can get it from www.radioshack.com or from www.partstore.com or from www.shopjimmy.com --------- thanks.please do rate the solution.thank you for using fixya.keep updated.

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as sound is present but no video it is due to loose contact in connector or print. if it is ok than there must be oroblem in ckt. 1 crt base loose. 2 supply to video &signal processor absent. 3 components in video section. 4 voltage on crt base not proper like g2 & filament. remember it is not major problem. hope this will help good luck.

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as sound is ok means power supply is ok. 1 check for filament if it is glowing means it is ok otherwise check for its supply. 2 check video and crt pins voltages 3 check for connector loose 4 luminance section in chroma ic. good luck

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Sansui 2110


as your sound is ok so your power supply & high voltage section is ok.(eht). please check 1 filament is glowing, 2 crt base for loose 3 voltages on crt points 4 luminance in chroma ic

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GE model 27GT722


Sorry, the board is not available as a replacement. That connector can be replaced by a skilled tech.

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