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Philips 47PFL7403D 47 in. LCD TV Philips 47PFL7642D/12 47 in. LCD TV

Sound but no image

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 92 Answers

SOURCE: vizio 47" lcd no picture no sound has power

this could be one of two problem. first, check if you have back light. If you do then the problem is with the M/B. Second, if you don't have back light then the inverter is bad and needs to be replace.

Posted on May 20, 2009

  • 148 Answers

SOURCE: Philips 47

Hi there, they problem is not in the input to the tv (dvd/cable etc) your powerboard/videoboard is overheating! Right away place a fan as close to the back of the tv as possible, this will help cool the circuits down and might considerably prolong the usefullness of the tv..The next step in it breaking down is total powerloss, or a blinking powerlight, eitherway this is your solution;The caps (capacitors) in the powerboard are going out. This is a very common problem in all class and price ranges of modern lcd and plasma tv's/ monitor's. I don't know if this problem has been like this for awhile or it just started, but either way, if the tv takes an abnormal amount of time to "warm" up then it most likely will go out all the way sometime in the (near) future. If you have a tiny bit of will and knowledge ypou can open the unit and get to the print board. Examine this for "popped" capacitors, they will have a buldging top instead of a flat one. Im gonna try to include a pic of them here, if i can get it this time, I've tried bfore lol. But you can google image a "popped" or "bad" capacitor and you would be able, with ease, to diagnose if you have any of these. Usually only one or two. Radioshack sells capacitors (couple anyway) for $1.59 each. MAKE SURE the replacement is of the SAME voltage or HIGHER, or you will be right back replacing those 2. Every capacitor has a negative pole marked with an (-) on the side of the capacitor(by one of the "legs", always puit the negative (-) "leg" of the new capacitor in the same hole in the printboard as where the previous negative (-) "leg" of the capacitor was ( a capacitor with the negative and positive "legs" put in backwards will result in the new piece "popping" as sson as you turn it on!!) make sure the "uf" rating (for example the most common popped capacitor is the 1000 uf) is the same as the one you are replacing. I needed 1000 uf, 105 c and 26v (volt) ratings for the 1 capacitor I needed to replace to fix my LG 19" lcd panel monitor I found by the trash that the light came on off, but it didn't come on. I replaced that capacitor with ; 1000uf, 85 c and 36 v (volts0...It works fine eventhough the volts and the temperature rating (36v and 85c) was not the same as the (26v(volt) and 105c ) capacitor I removed !! Further, I've replaced capacitors that had the celcius rating of 105 with the only ones Radioshack had, namely 85 c(celsius) they have been working great, but I'm not sure about any effect, nor have I heard or read (yet?) about that making an urgent difference. Many threads that I've read people have done the same, so we should be ok (my stuff has been running good for a while longer then most brand new ones!.............(all these ratings ; 'uf ' and 'c' etc are on the side of the capacitor you are replacing and on the side of the ones you are replacing them with)...For all this all you need is the cheapest solder gun u can find (I bought one for $7.99 at Radioshack), a camera (to take pictures as you go to remember how to reassemble the unit) and, once you have your materials, 20 minutes to replace 2 or 3 capacitors and you are good to go...Most monitors and tvs (lcd/plasma) I've seen you have to lay flat on the ground/bed/blanket etc, to work on (screen side down). Usually there are 2 or 3 screws (or a few more) to remove, then you will have to carefully (its comes off easily most times)insert a flat screwdriver inbetween the casing and gently pry it up as you go around the whole frame. Sometimes you have to remove the little washer arouind the cable input orso, just be gentle and you cant go wrong. Once insidet here will be a box with wires running to the sides etc...unplug, gently, these wires and open the box. Inside you will find 2 or 3 circuitboards, check them all for "popped" capacitors, replace, reassemble and plug it in....Have fun becoming an overnight tv mechanic lol! If this helped (or not )please rate, thank you!d4195d7.jpg

Posted on Feb 04, 2010

  • 10 Answers

SOURCE: Philips LCD TV "47, model PFL 8404H/12, NO SIGNAL on all 4 HDMI

This is quite tricky as it was working until last night and suddenly stopped receiving signals. What can happen wrong?
Do you have any other Player or other HDMI cables to try out. Sometimes the cables would be damaged or PC may fail to detect the HDMI.

Try this out from Philips helpdesk where there is new SW and FAQs are available.
http://www.p4c.philips.com/cgi-bin/dcbint/cpindex.pl?ctn=42PFL8404H/12&slg=en&scy=CZ

Let me know if you are not able to upgrade the FW (if you do not get the support on ugprading)




Posted on May 11, 2010

mace1mace
  • 1138 Answers

SOURCE: my philips lcd tv has sound but no picture what is

change the backlight (cold cathode light) on your monitor.. If you are able to open the back of your lcd monitor carefully, the backlights are located at the upper and the lower part of the edge .. replace it with conventional cold cathode lights(protective tube was removed)... there are also instances that backlight was good but the ballast transformer is burnt. Replace the ballast. Its very cheap to replace that.

Posted on May 18, 2010

joeymille916
  • 143 Answers

SOURCE: OUr 47" LG LCD TV takes over 12 hours to turn

My bet is your power supply board has gone bad and some capacitors need to be replaced. If it's under warranty, take it to the shop for repair. If it's not, then you can replace them yourself or if you know some one who solders electronics they could do it also. To keep this from happening again buy a ups backup power supply which will condition the power to the tv and other components and save you alot of time and trouble later.

Posted on Oct 08, 2010

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1 Answer

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Board for the screen has a bad component or a bad solder joint. It will need to go to a repair shop. It may be cheaper to replace the tv.

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Seal deal w/ ours. I took it apart and the power supply board had the burn marks on it. Just ordered another power supply board (pn: 272217100571) for ~ $100. TV back panel comes off fairly easily to get at boards.

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It beacause of dust inside ur tv.U can open ur t.v and clean it.Or ur need to change ur picture tube

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hello,
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