Question about Projection Televisions

2 Answers

Hi guy's....i have a samsung sp 58 rear projection tv and there is no power to the screen when i turn on the unit.... can hear the audio and all the connections are right.... it would loose the screen and if you turned off the unit and wait 10 minutes , and turned it back on would be o.k but now there isn't any power to any of the 3 globes. is it r/s or can it be fixed by a repairer and at what sort of cost ..... cheers dave

Posted by on

2 Answers

This is a CRT Projection TV and of course does **t have a "bulb". Since power supply problems are rare in Samsung rear projection tvs I would be inclined to first check for CRT "leaks". There is glycol based coolant used in the crt that sometimes will leak onto the main and or deflection boards. This is definitely something I have seen in these models and can cause all sorts of weird problems. After removing the back cover, one could just inspect the boards (under where the tubes are mounted) with a flashlight VERY carefully and very thoroughly. If you find a spot you will likely be looking at repairing/replacing the leaky tube as well as cleaning or repair of the board,

The other thing I may try is to look at the convergence circuit to see if it is causing the high voltage to shut down (causing ** illumination to the tubes). This will of course require experience in electronic troubleshooting experience and the proper equipment. Some models have a small convergence amp pcb mount above the main boards with 2 large ICs on it (stk392-040's). If this model has this, you could try and disconnect the cables to it and see if it fires up. If it does the picture will be distorted, but at least you will k**w that the convergence amps are the source of the trouble.

In any case, unless you have electronics expertize, this will be very challenging for you to work through.

I

Posted on Mar 09, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 75 Answers

Check the Bulb of your projector if seen is open now and check the inside Supply Circuit of it try to check the fuse on it.

Posted on Mar 09, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Picture is skipping on my samsung 55inch rear projection tv


Hi Stile,

Do you hear any clickimg? If you do, it could be your ballast and if your TV is 3 to 4 years old then you want to replace your lamp,you can get good price and advise with the guys at DM http://www.discount-merchant.com/?CLICK=52978

please keep us posted

Oct 05, 2009 | Samsung HCL5515W 55" Rear Projection...

2 Answers

SAMGSUNG REAR PROJECTION TV SP-50L7HX


check for the power supply especially the capacitors

Mar 16, 2009 | Samsung HLN5065W 50" Rear Projection...

1 Answer

Picture/sound goes out after 10 minutes of TV use


Rear projection hdtv, most likely damaged tubes. Don't repair this by your self get a tv repair man to do it before you injure your self.

Jun 24, 2008 | Pioneer SD-582HD5 58" Rear Projection...

2 Answers

Samsung 61" HDT5087S/HL


How old is the unit?
ever replaced the lamp?
Sounds like a major power supply failure
Hope you are under warranty
Samsung has lots of problems with this technology
Here is their phone for executive customer relations: 1-800-522-7341

Dec 30, 2007 | Samsung HLN617W 61" Rear Projection HDTV

2 Answers

Samsung SP-52Q7HE


Convergence ic need to be replaced.
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

Dec 10, 2007 | Samsung HC-P4752W 47" Rear Projection...

2 Answers

Samsung HLP5063WX/XAA 50" DLP


Here is a site for ColorWheel replacement, which is what you need to do if you hear that screeching or fan running noise coming from your TV. Sometimes the wheel just explodes which gives you no picture.

http://www.jangro.com/electronics/samsung-dlp-replace-color-wheel/

Sep 29, 2007 | Samsung HCM4215W 42" Rear Projection...

2 Answers

Elite Pro 610HD Turns off


You may need the power supply board resoldered as I had the same problem. The guy listed below can do it for you as I shipped mine from Illinois to him in California... Piece of cake getting the board out of the back and it's not too fraigile... Just pack in bubble wrap and it will be fine. My TV is now working great.

BUT DON'T DELAY AS SOONER LATER TV WILL NOT RESTART..


http://www.avsforum.com/avs-vb/showthread.php?t=402397&pp=30&page=38

Good luck.



cell

Sep 09, 2007 | Pioneer PRO-610 58" Rear Projection...

2 Answers

Will not Turn-on


the deflection/convergence board requires replacing.the set is checking itself and found a problem and went into shut down.

Sep 04, 2007 | Samsung HCL4715W 47" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

172 people viewed this question

Ask a Question

Usually answered in minutes!

Top Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

Are you a Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...