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Dead set, on standby mode only

DEAD SET, NO RASTER, ON STANDBY ONLY

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  • ed2008 Jul 29, 2008

    DAEWOO DTQ-20V4N DEAD SET, ON STANDBY MODE ONLY

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  • 623 Answers

You might have a burnt transformer,take it to a tv repairman or buy a new tv set

Posted on Jul 29, 2008

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Sony TV set, KV20FS120 BA6 chassis: light blinks, set isn't coming on. Why?


Sony sets like this have a built-in self-diagnostic function.
The blinks of the Standby LED are the self-diagnostic codes.
There may be more than one error. The blinks indicate only the first error.

Unlug the set. Wait 30 seconds.
Prepare to count the number of times the Standby LED blinks.
Plug the set back in. Count the blinks.

2 blinks
  • Diagnostic Item Description: +B overcurrent (OCP)
  • Probable cause:
    • H.OUT (Q506) is shorted. (A Board) (20"/21" models only)
    • RGB Amp (IC1751) is shorted. (CV Board)
  • Detected Symptoms:
    • Power does not come on.
    • Load on power line is shorted.
4 blinks
  • Diagnostic Item Description: I-Prot
  • Probable cause:
    • +13V is not supplied. (A Board)
    • IC545 is faulty. (A Board)
  • Detected Symptoms:
    • Has entered standby state after horizontal raster.
    • Vertical deflection pulse is stopped.
    • Power line is shorted or power supply is stopped
5 Blinks
  • Diagnostic Item Description: IK (AKB)
  • Probable cause:
    • Video OUT (IC545) is faulty. (A Board)
    • IC001 is faulty. (A Board)
    • Screen (G2) is improperly adjusted.
  • Detected Symptoms:
    • No raster is generated.
    • CRT Cathode current detection reference pulse output is small.

The above may be of little help. Your best bet is to download the service manual for the KV20FS120.

...Google search: Sony KV20FS120 service manual

Apr 26, 2016 | Sony Televison & Video

1 Answer

WHEN SWITCHING ON MY PANA CRT TV IT MAKES A SOUND LIKE A SQUEEK 7 OR A TIMES AND GOES BACK TO STANDBY


There is short circuited component/s at its horizontal scan output stage circuit. Check the horizontal output transistor first. Check it for collector to emitter, or collector to base, leak. Replace it with the same numebr, and check. If it do not help you, check and replace the Line Output Transformer [LOT]. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts.

Jan 01, 2014 | Panasonic Televison & Video

1 Answer

My sony kv-ef3491 Has entered standby state after horizontal raster


If set does not make it on then the light on the front blinks for example--count the number of blinks before a pause----Horizontal line left to right?

Oct 31, 2012 | Televison & Video

2 Answers

Can't change channels, volume, or power off or on


You need a new frount control raster for this TV, what has happend is this little circuit board under the buttons has given out. You might have lost the function to control with the remote as well. The best thing to do here is take it to a tv repair shop. and have it looked at.

Diagnosis: bad control raster
Prognosis: replace raster with spare or new

Do not shoot the messenger please do leave postive feedback and ratings today.

Jun 14, 2010 | Toshiba 32A33 32" TV

1 Answer

SONY TV PICTURE TURN GREEN WITHOUT RETRACE


Picture goes to high green with retrace lines that shows picture tube is defective and requires replacement.
Usually in above symptom, TV goes to standby mode and standby light blinks when green raster problem occurred.
New TV is better option because picture tube of KV-34XBR960 would not be available any more.
Thanks.

Aug 14, 2009 | Sony Televison & Video

1 Answer

I was watching my kp61v80 and the screen went black-can you give me the trouble codes for the flashing standby light


Diagnosis item
TIMER/STANDBY
Indicater
Number of blinks
Supposed malfunction Condition
Self-diagnosis
screen display,
Diagnosis item: Results
•Power not ON 0
[Standby Power Supply System]
F601 open.
R607 open.
Q601 short circuit
[Main Power Supply System]
IC601 and R612 are broken.
VDR601 short-circuit
Cannot turn on the power.
LED doesn't blink.
+B OCP detection 2times Short circuit of power supply system in each circuit.
Goes to the standby mode
Short circuit of +B line
2 : +B OCP 000
+B OVP detection 3 times
T603 pin 78 open.
R672 open.
Goes to the standby mode
Malfunction of power supply circuit
3 : +B OVP 000
Vertical deflection stop 4 times
IC1509(V out) is broken.
Q1505(V Pulse Buffer) is broken.
Raster goes to one line horizontally, Aand then video
signal is muted.
4 : V Stop 000
Video out abnormality detection 5 times
Video out, Q705, 732, 761 and others in C board
circuit.
Q218, 219, 220 (A board)
TIMER/STANDBY LED blinks approx. 30 seconds,
and then blinks for the self diagnosis.
5 : AKB 000
Horizontal deflection stop 6 times
C515, 516 open.
IC206(YC Jungle) is broken.
Raster doesn't appear. 6 : H Stop 000
Audio abnormality detection 8 times
IC406(Audio amp.) is broken.
PS401, 402 open.
The sound is not out.
Goes to the standby mode
8 : Audio 000

Jun 17, 2009 | Televison & Video

1 Answer

TV dead; unresponsive, no raster, nothing.


You may have lost the standby power supply. There should be a 5v supply that runs with the set in standby, see if you can find that. Also check for B+ (around 160VDC) at the large filter capacitors in the power supply.

Oct 06, 2008 | Toshiba 36A60 36" TV

2 Answers

Dead Set


No power, no sound. your tv is gona be dead set problem when they have no standby mode or standby ligth. need a repairman tech.

Apr 10, 2008 | Samsung CW29M64NS 29" TV

2 Answers

Help with kogi F9AH screen


Intermittently displays bright red/green/blue raster then shuts down with led flashing 2, 4 or 5 times
Amazingly this was due to the CRT being faulty !

Blank raster
Replace defective TDA6111Q for Red, Blue and green

Red or Green or Blue screen
Check and replace on crt module : D702, D703, D704 (all 1N4148) replace with type 1N4948T

Dead, led flashing red/green at first, then going to red standby
Replace C604 (1000uF, 16v) elec. cap. It is in the decoupling circuit for the 5 volt supply

Nov 23, 2007 | GVision F9AH-TG Television

1 Answer

Circuit board was damaged in electrical storm. Replaced with new board. Now, screen comes on full raster, but with retrace lines. Picture is very faded and barely visible behind lines. Sound is OK and...


I am unable to find in your statement about which brand or type of motherboard is used. One thing i come to know your using service mode kit. knowing in your statement your are a technical person. My simple idea is first you set the TV in standby mode using remote. Then in FBT reduce the screen control minimum position, the release standby. Now the tv is oscillated, now slightly increase screen control till get maximum video and zero retrace line set in position. Even no improvement give me clear picture of brand and microprocessor ic etc. there is a chances to solve by having the above details.

Aug 27, 2006 | Sanyo DS31520 31" TV

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