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Dr. Fix-It
Dr. Fix-It, Technician
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I have a Sony Bravia. Its has been turning off by itself for

Resolved Question:

I have a Sony Bravia. It's has been turning off by itself for the last 6 months and the standby light blinks off and on. It takes un plugging and plugging in the cable box to get it working again.
I need to know how to fix this please
Thanks
Harvey
Submitted: 3 years ago.
Category: Consumer Electronics
Expert:  Dr. Fix-It replied 3 years ago.
Hi thanks for your question, I will evaluate it and respond with some logical and quite practical solutions for you in a timely manner. . .

The issue appears to be the cable box output and not your tv itself-

First have to isolate to if the issue with the cable box, the actual cable between the two devices, or the input on the tv unit.

I suggest to connect the cable out to another tv input terminal and inspect the cable for any breaks or exposed wire that could be shorting against something.

If move to another tv input, cable looks good and resolves your issue then the previous tv input terminal could of been the issue.

If shutdown still occurs then it is likely the cable box output is causing the shutdown. Also it is important to count the # XXXXX blinks the led is flashing as represents a fault code of the tv. The cable box may have an alternative output as well which may try or if have another cable box can try it.

Customer: replied 3 years ago.
I will try these options and let you know
Thanks
Expert:  Dr. Fix-It replied 3 years ago.
OK let me know and if need more help if can provide complete model of your Bravia and the standby led blink count.

When the STANDBY indicator is flashing in red, the self-diagnosis function is activated.
Count how many times the STANDBY indicator flashes between each two second break.
For example, the indicator may flash three times, go off for two seconds, then flash again for three times.


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.

*Unit is dead, No blinks - Problem in the standby power section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should show open).
*Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective.

*One blink - not used for the self-diagnosis

*Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.

*Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.

*Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505

*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.

*Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.

*Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

*Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code. Check IC406 audio amp, PS401, and 402. On some projection models of Sony TV sets, this code means that T8005 (flyback transformer), or the associative components in the high voltage circuits are defective on the D board.

*Nine blinks - Replace D 6116 and D 6301 on the "G" board, do not resolder as this will fix the problem temporary. Or Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing, then change the switching regulator on the "G" board or check connections. Make sure the regulator is -12 or -13 (negitive).

*Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the " D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board.
Intermittent problems? This is a great feature. You can also bring up these fault codes on-screen to see a list of the problem numbers with the abbreviation of the problem and the number of times this problem has occurred. This is slightly different than entering the service mode. To see the diagnostic screen, press the following buttons: Display, Channel, 5, volume Minus, ( not plus ) then Power. This brings up a screen with a list of the problems and number of times they have occurred. Each of the problems named, are abbreviated as, "OCP", "OVP", "V STOP", ETC. We have repeated them in parentheses in the text for the "Blinks" described above so you can correlate between the diagnostic screen and the blink codes.

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.
Dr. Fix-It, Technician
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Customer: replied 3 years ago.
It's six blinks on the stanby light Not sure what you are saying for me to do
*Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately. Check C515 & 516 and the jungle IC, IC206.

Tell me please exactly how to fix this?
Harvey
Expert:  Dr. Fix-It replied 3 years ago.
The codes is a reference to what the TV 'thinks' is happening, and then needs to verify such faults not being caused by another outside cross feed such as the cable box connected, so still would recommend take the step for isolation test given intially.
*
For Intermittent problems, This is a great feature - You can also bring up these fault codes on-screen to see a list of the problem numbers with the abbreviation of the problem and the number of times this problem has occurred. This is slightly different than entering the service mode :
^
To see the diagnostic screen, press the following buttons: Display, Channel, 5, volume Minus, ( not plus ) then Power. This brings up a screen with a list of the problems and number of times they have occurred. Each of the problems named, are abbreviated as, "OCP", "OVP", "V STOP", ETC. We have repeated them in parentheses in the text for the "Blinks" described above so you can correlate between the diagnostic screen and the blink codes.
^
Six blinks means the tv is sensing, "LOW +B OCP/OVP (overcurrent/overvoltage)". The probable cause locations identified are in the tv are:
1) +5 line is overloaded (A, B, M boards).
2) +5 line is shorted (A, B, M boards)
3) IC504 is faulty (A board).
*
These voltage signals can be effected by the load connect such as the cable box interface which may be causing spike that tv is seeing as a short condition on its power supply. Otherwise if isolated and still have the issue then the internal board component of the tv needs repair.
Dr. Fix-It, Technician
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