Question about Sony Televison & Video
My sony trinitron KV25DA1 has only sound but no picture appear, but after 5 to 8 hours of warming up it shows the pictures in selected channels and when i try to change channel the picture went of and then the red blinking lights went on and of every 2 blinks. Can i have ifo on this and how to fix it?
1. Your TV has a weak picture tube, the beam current detection circuit muted the video, you may rejuvenate the CRT, or turn up screen control (located on the fly back transformer) a little it may help.
2. Other thing is that to check out is there any dry-out electrolytic capacitors in the main power supply circuit.
Posted on Jan 15, 2018
That blinks and flashing have a diagnostic code;
Here is a list of the problems that might have occurred indicated by the number of blinks. The words in parentheses are those, which you will see for each of these faults on a diagnosis screen described later in this article.
Now that you know about these self-diagnostics, how do you use them? Say that you have a set with a black screen. You see that the LED is blinking four times. This would tell you that you have no vertical sweep, which is why the video is muted. If it was blinking 6 times, you would know that you have a horizontal fault. It's not a sure cure..
IMPORTANT: After you repair the unit, you MUST clear the values on this diagnostic screen. These codes do not reset themselves after the fault is corrected, so if you don't clear them, you'll be seeing "old" fault codes the next time you enter this screen. Clearing is done by going into the service mode (display, channel, 5, volume plus, then power ). Press 8 and Enter, which returns everything to the factory preset condition.
Hope it may help you;
Posted on Jan 31, 2009
have over 10 years experience in electronic tech
I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.
If the TV is no longer in warranty, it will likely cost a minimum of $150 parts and labor. This is assuming that you only need one circuit board or small part. If the problem is more than one of the circuit boards, the price of repair could go much higher.
I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.
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Posted on Jul 11, 2009
You have what is commonly known as a shutdown problem. It's an overload in one of the internal circuits. It needs to be looked at by a professional tv reapir person.
Posted on Nov 03, 2009
SOURCE: volume lock of philips vardan tv
I hv philips 21RF vardaan TV ,there is sound on AV channel. and the picture is blinking. even some menu setting have changed.. i tried using the service menu but cudnt understand anything. 2 new av channels have come.. av2 and front which were not present before. sound is not coming even on the other channels but picture is fine on them. only on the av1 channel it is blinking., the philips technision had solved this prob once by pressing some code by remote and i don't know the system code
Posted on Jan 13, 2010
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