Question about Sony KV-27V42 27" TV

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No video signal

The video in on my sony TV just quit working. Video from the tuner is just fine, but if I have the input set to video 1 or 2 with a signal on the composite video in, I just get a black screen, though sound works just fine. If I feed the video signal in through the SVideo in, I get black and white video, but no color. It used to work just fine, so I am not just wiring it wrong. ( I have tried three different DVD players and my powerbook in each of video 1 and 2 and SVideo, and the results are always the same).

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I have had the input switching IC, and or parts failures in the input amplifiers go defective in these sets.

This can happen from a static electricity discharge while connecting something, or if one of the devices being connected has an electrical leakage and causes some current to come up in to the input of the TV set.

I have also had the input jack assembly go defective and require servicing. This is from one of the jacks breaking and causing an internal short, or if the circuit board became cracked or broken from the TV falling or being roughly handled.

Jerry G.

Posted on Apr 17, 2008

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Check to see if rear audio/video inputs work or not--DVD player etc.

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1 Answer

Sony KV- 20FV12 get no signal on screen. Same cable outlet works on other TV as a test. Cable ON in menu. Auto Set search produces search but still no signal.


Hello

If auto search is going on smoothly, and there is no stations on air is memorized, and display no signal, there are tow possibilities. The first one is antenna is not connected properly. Check the antenna connection for firm. The second one is tuner fault. If the tuner inside the tV is faulty, or it does not gets proper voltage to work, this type of fault land display will see on screen. Check if proper voltages are comming to the tuner section in circuit board. If voltages are ok, and still there is no signal display, just check it with external video input. That is, connect it to any dvd or cd with AV connector, and set the TV to AV mode and play a disc. If there is picture, the video side of your TV is OK. If not, Video-chroma-RF jungle IC is faulty, and not the tuner. OK.

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Right now there seems to be many people with the same TV problems with sony and HDMI cables. Most of the solutions are resetting the TV and sony product. Try leaving your TV unplugged for a hour to let it reset itself.

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The HDTV tuner is out. Analog tuner, and video inputs work fine.
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Part Type MAIN UNIT
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1 Answer

How do I set up the HD on my tv?


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2 Answers

No HDMI Output


My configuration:
ZONE 1 (living room)
DishNetwork Dual Tuner DVR Tuner 1 [S-Video out] -> [S-Video in] ONKYO TX-SR875 [HDMI out] -> [HDMI in] Sony KDS-60A3000 rear projection TV

ZONE 2 (living room)
DishNetwork Dual Tuner DVR Tuner 2 [Composite Video out] -> [Composite Video in] ONKYO TX-SR875 [Composite Video out] -> [Composite Video in] Samsung AQUOS LCD TV

Problem:
ONKYO receiver stops sending video signal to my ZONE 1 Sony TV through the HDMI connection. ZONE 2 may still receive video. (NOTE: the issue might be related to the upconverter circuitry?)

Symptom:
I couldn't see any video, but I could hear the Tuner 1 audio through my ONKYO. An important clue is that I couldn't see ONKYO's on-screen display menu on my TV when hitting the [Setup] button on my remote. But, I could see my TV's Sony-based menus and display options.

Solution:
1. Put all ZONES in Standby mode using the remote. Hit these buttons on remote: [Receiver], then [Standby]. [Receiver], [ZONE2], then [Standby], [Receiver], [ZONE3], then [Standby]. You should NOT see any lights on the ONKYO except maybe one red led near the power button.
2. Pull the power plug out of the back of the ONKYO, and leave unplugged for 20-30 seconds. Turning off any power center it is connected to isn't enough. You MUST unplug the power from the back of the ONKYO for 20-30 seconds.
3. Reconnect the power cord to the ONKYO.
4. Using the remote, set ZONE1 to a video source known to be working. If you don't see video, try leaving the power cord off for a longer period.

I know it sounds too simple to work, but that's what brought the video back for me the few times the video stopped displaying. Hope it works for you.

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1 Answer

No picture or sound - think the tuner is bad


You may either have a bad tuner in your TV (not unusual for Sony's) or a broken connection near the tuner on the flimsy circuit boards they're using on this model. The tuner requires about 30 volts DC to work, and this may not be reaching the tuner due to a crack in the board connection. You probably have several A/V inputs that can be used for cable video and DVD video and your owners manual should explain how to connect them clearly. The outputs of those units go into the inputs of the TV set. It's That Simple!

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