Question about Sony KP-51HW40 51" Rear Projection Television

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I believe the picture tube went out on my TV How can I be sure that is the problem and where can I order the part from?

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Most of the time when a Tube shorts out If Red then when set come on after a few sec you will see red lines go across screen then TV will shut off If Green then green lines so on.you can unplug CRT board on tube one at a time unless you know which one maybe bad If tube is bad set will play with CRT disconnected.

Posted on Jan 08, 2009

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I have a 8 years old apex tv. while watching tv the picture went out but it still has sound. i can't see the channel numbers or volue bar is it worth fixing


I WOULD SAY NO ! THE PICTURE TUBE IS PROBABLY AS MUCH AS THE TV IS WORTH. i had a very nice sony trinatron tv. the picture tube whent on it at about 5 years so I CALLED FOR REPAIR AND THE PICTURE TUBE WAS 2-300 DOLLARS. good-day !

Jan 20, 2012 | Apex Digital Televison & Video

2 Answers

No picture but with sound


There are three things you should try. If you can safely pull the back cover out safely, do so. First thing to look for,is the suction cup attached to the picture tube securely? Be sure that it is. Make sure the TV is not plugged in, when you check for a good ground to the Tube (suction Cup). Then plug the TV in and power up. Still no pic? If you feel that this is not the problem, next, pull the board out of the TV. Be sure to discharge the picture tube before you remove the suction cup. Unplug the TV. A wire taped to a flat screwdriver, the other end of the wire connected to the silver braid that surrounds the picture tube. Now slip the screwdriver under the suction cup, you will hear a snap, you have discharged the tube, you may remove the suction cup. And you may pull the board completely out of the TV. Find the vertical IC and resolder the 7 or 9 pins. Do not use excess solder and short the pins together. Each pin must soldered individually and not together. Check for bad solder grounds on the horizontal transformer. This transformer is usually a small square box with five or six pins. When not soldered with a good ground, it will crate the problem you describe. Next, solder the pins on the Flyback Transformer. Resolder any and all power resistors. A power resistor is one of two watts or more. I do not believe your horizontal transistor is bad in this case, you resolder this as well. A bat transistor would hand you a dead TV. Do go over the rest of the board and really look close for any and all bad solder grounds, solder as necessary. Last be sure you have good solder grounds on the back of the small board that connects to the picture tube. I'm sure you will get your picture back, try all of the above and let me know how things go. Thanks for asking and show all hands of support!

Jun 23, 2011 | Sharp 27R-S50 27" TV

1 Answer

Picture went completely fuzzy. What could the problem be?


The tv CRT( picture tube) have a radiaton posion infected in ur tv picture tube.This is how u discharge the CRT(picture tube) get the posion out.Take the tv back cover off.Take video board that connected to the CRT(picture tube) out.Plug it in,so u have a live current to the CRT(picture tube).Find a wire like an AV cable,should be find.One side of the metal,grounded to the metal frame somewhere.Take a long needle plier grab the other side of the AV cable wire,not the metal,(Caution high voltage live current).Come very close to the open CRT(picture tube).U will have a live current arc,than u,will hear a big "POP".U,just discharge the CRT(picture tube).The tv now the CRT(picture tube),now it good,it clear of posion infected in ur tv picture tube.Now,unplug ur tv.Put ur tv,back together.Hook up ur tv signal cable and plug in ur tv,now ur tv picture,will be clear,completely.I do this many times to dicharge fuzzy CRT(picture tube).When i was a tv Tech.for the SONY TV Corporation.

Oct 12, 2010 | Sanyo HT32546 TV

1 Answer

I have an Mitsubishi HD1080i series rptv, the tv is about 10 years old, yesterday as I was watching the World Series, my picture went to a pink glow and I seemed to of lost some of my color especially...


This may not be a picture tube problem, but considering the age of the unit it may be cold solder joints on or near the crt boards. Each tube has a CRT Board attached to the neck of each picture tube. Check these first for bad solder connections, in not then it may be the green tube has finally failed you. Getting tubes for this old of a unit will be very hard. IF it is the Tubes then i recommend you think about purchasing a newer set..

Nov 05, 2009 | Televison & Video

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HELLO OUR 53" PANASONIC REAR PROJECTION TV JUST WENT RED LAST NIGHT AND THEN WENT OFF AND IT WILL NOT COME BACK ON ANY IDEAS. IT TRIEDS TO START UP WITH A BLINK AND THEN OFF AGAIN


This model TV has a gasket on the red picture tube that faces down. The coolant leaks from between the picture tube and the lense assembly. When this happens the red tube over heats and shorts out internally and usually cracks the glass.You will probably find coolant all over the circuit board if you open the back panel of the TV.
Call a good TV Tech to repair this. It will cost over $500 if the picture tube is still available.

Jul 30, 2009 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

TV WENT BLACK WITH BUZZING/SOUND


hi the problem is the picture tube of ur television has got damaged.. its better to replace a new picture tube...

Jan 24, 2009 | Philips Magnavox 27MS343S 27" TV

1 Answer

50''dlp had to replace the lamp, picture not as good as before


ok what you should do is to check in the old lamp the part number and who made it. dont believe what some sellers try to envolve, if you dont have that info check with tv model what part really is missing.......saludos

Nov 17, 2008 | Samsung DLP HL-P5663W 56" TV

1 Answer

Is my picture tube going?


Most proj TV's of that type have 3 Picture tubes Red, Green and Blue. It's not likely that all 3 went bad at the same time in the same manner. So I believe you have a circuit problem, probably in the power supply stages, possibly a bad solder joint.

Hope that helps...

Geno

Mar 25, 2008 | Televison & Video

1 Answer

Akai model ws-p28ntf-sf-d-gb (s) tv/dvd combo


I believe you either have a problem with your Power Supply inside your TV from a defective component in the circuit or you have a problem with the Picture Tube on your TV. I don't recommend you working on TV's by yourself unless you know what you're doing since you can get badly shocked. You need to discharge the Picture Tube on the TV before you work down any further. If you don't know what you're doing then you should get someone that knows what they're doing to work on your TV.

Jan 20, 2008 | Akai CFTD2083 20 in. TV/VCR/DVD Combo

1 Answer

No picture, just went off while watching tv


The pink lines in the set happened when the first time it blew out. It is called a burn in on the inside surface of the picture tubes. Not the fault of the TV repair guy. This is the fault of Toshiba. This set has known to have this happen and you should contact toshiba and request that they replace all three tubes for you at no cost. You should also stop using these repair guys who cannot fix a simple vertical problem. Find out who is authorized for Toshiba in your area and call them. They will know, or should know the problems that happens with this model number and take care of them once and for all. Good Luck

Nov 06, 2007 | Toshiba 51H84 51" Rear Projection...

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