Question about Sony FD Trinitron WEGA KV-36XBR800 36" TV

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Blinking/standby timer

It just started turning off at on it's own.model#kv-27v40 manufacture date sept.1998.blinks 4 times in a pattern.i've had it for about 6 months.great picture ,it won't turn back on. any help thank you

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Sony Trinitron TV. Worked well last evening. Now picture won't go on. When power is turned on, standby/timer red light flashes, but picture or sound does not work.

Posted on Jul 15, 2009

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Posted on Jan 02, 2017

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Standby timer blinks times


There are particular blinks meaning on sony TV. I can give you the problem from your sony tv if you specify or count how times the LED flashed.

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I have a sony trinitron 27 in. model KV-27S45 1998 it will not turn on and the stand by timer is flasing 4 times dont know what to do


Hello
Vertical IC inside your Sony TV has damaged [shorted]. Four blinks of standby light denotes it. The number of blinks of standbylight in Sony denotes some fault, and can be determine according the the continueous blinks. In your case, the standby light will blink four times, then stop for a while and will continue to blink four times and so on. Vertical output IC should be replaced with same type and number. If you are aware in electronics and have tools, you yourself can do the work.
If you wants anymore assistance, feel free to get me by Fixya.
Thanks for using Fixya.

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Many of the later model Sony TV’s have a built in self-diagnosis function. If the timer/standby indicator is blinking, this could be an indication of a problem with the unit. The diagnostic blinking will occur automatically with no action required by you to engage it. in yor case you have 5 blinks that´s why the last is short to be possible the count..Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.

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1 Answer

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Hi,

Sony has self-diagnostics built-in to the TV. This is as you noted indicated by the blinking LED light(s). Initially and based on conventional TV sets, the four (4) blinks a vertical failure. This would normally mean the vertical IC requires replacement. In some Sony versions/models, the IC would be LA7835 but this has to be confirmed on the actual part from the PCB. There are instances where the IC is not defective but the diode and/or limiting resistor from the FBT that provides the ~+28VDC supply to the vertical IC that could be defective. As you will note, this is rather a technical repair and not an easy user action. This of course would require a familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Nov 16, 2008 | Sony KV-27V40 27" TV

1 Answer

Trinitron suddenly turned itself off.Now doesn't go on.


Hi again,

I was just checking similar problems and saw that you posted twice.

Pls see your other post here with my proposed solution.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

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