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Regarding 29gx1891/56r Philips Colour TV,LED keeps on blinking.

Power supply output is 134 volts, without load. If TV is forced on, voltage drops to 124 volts. What is the adject supply voltage? As soon as the EHT gets on, the set goes to stanby mode, and LED keeps on blinking.

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The problem was detected as a case of unregulated Power Supply Output. A sort of Crowbar is set in operation if the Power Out is above tolerable limits, which cuts off the supply to the Horizontal and etc. IC TDA 8362. The diagnosis was a faulty PWM IC 3842.

Posted on Feb 02, 2009

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6ya6ya
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Posted on Jan 02, 2017

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Is totally dead. First, I received blinking led, but right now, nothing. Si habla espanol, mucho mejor para mi, si no, puedo conitnuar en ingles.


Hi Eduardo,

First of all, thank you for contacting Fixya.com regarding on your TV problem.

I'm assuming here that your TV's model no. is TCP50S2. Most of the blinking LED on Panasonic TV's has a corresponding error code let say the led blinks 5 times(won't turn on), it is a 5 Volts malfunction either on the P board (power supply board) or on A board. Some of the blinking led error code are related to faulty electrolytic capacitor on the power supply board. It will dropped the normal working voltage of the power supply and will disable the unit. Faulty capacitor most of the time has a physical indication of fault like bulged/dome at the top and can be easily identify through visual inspection. Watch the video below for more info.





(do not delete) utube.png


In your case, you've mentioned that the TV is totally dead set now, this is an indication of fault either on the P board or on A board but most cases I've encountered a faulty P board (power supply). I've suspected that your P board gone to multiple parts malfunction aside from the capacitor.

If you are going to DIY, I would advice you to check the output of the P board using a multimeter to confirm its condition. Once it has a missing voltage, replaced the entire board. Click it HERE for the P board's replacement.

Hope I helped you.
Have a nice day!

Ratings and feedback are highly appreciated!

Kind Regards,

Jdvillanueva

Dec 03, 2011 | Panasonic TCP50S2 50 in. TV

1 Answer

Blinking red light of death. 5 blinks. After holding power button while power on for 1 minute and then pushing agaiin I got 1 blink. Set has not been used that much as it is in the bedroom. One source...


Hi Billy,

5 blinks is an error code for 5Volts malfunction either on the P board(power supply) or the A board (main board).
1 blink is an error code for A board (no communication between the system CPU and panel CPU).
Since you've got 2 error code which are both related to A board, I've suspected that the A board is already faulty but you have to confirm it to isolate the P board from fault.

You have to check the 5 volts output of the power supply using the multimeter set in DC voltage measurement. Measure the output of the power supply board through connector P7. If you are getting 5volts on that connector you have to replaced the A board to resolve the issue. If there's no 5 volts output then the P board is faulty.

Faulty electrolytic capacitor can drop the output voltage. Let say you are only get 3 volts or less on the 5volts line, then suspect faulty filter electrolytic capacitor. Most of the time it has a physical indication of fault like bulged/dome at the top and can be easily identify through visual inspection like in the sample picture below.

11_22_2011_12_37_20_am.jpg<<< with dome at the top


If the 5volts line dropped its voltage, you have to disconnect the load and then re-measure it (do it very quick, don't let it turn on for a long time without the load). If the 5 volts line normalize after disconnecting the load (A board) then the fault is on the A board and not on the P board. If the 5 volts line still not intact after disconnecting the load, then the fault is on the P board (5volts line).

I've provided a link below for the suspected boards.

A board (Main Board)
P board (Power supply board)
Note : before ordering online, double check the part no. of your board that is printed on the white sticker on the board itself to ensure you will get the exact replacement. There's some instances that the manufacturer used different version of the board even on the same model no.

Please let me know if you need further assistance.

Ratings and feedback are highly appreciated.

Hope I helped you.
Have a nice day!
Jdvillanueva

Nov 21, 2011 | Panasonic TC-P42G10 Plasma TV

1 Answer

I have a Bush 26" lcd tv. when i try and power the


If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Can't answer more than this without any details.

Mar 27, 2017 | Televison & Video

1 Answer

Sony KV-20Fs100. Same problen as #4620488. TV


Hi,
4 blink of power led shows problem in vertical deflection section and most probably vertical output IC is defective, replace it to fix the issue.
Regarding .rar file type of service manual files, download winrar software trail version from internet, install it and use it to unzip .rar file to get pdf manual file.
You wont get +B volts because tv switch to protection mode and power supply shuts down. Service manual has blinking standby led error code details as well.
Thanks.

Jul 25, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Lambda ews600-18 voltage goes down.


there is a short circuit protection and overoad protection to smps so o/p capacitor may short or secondary diode may short .so check voltage at primary when switched off after 33seconds whether switching process is going or not for that check dc volt at i/p capacitor then check volt at collector of transistor if metr shows 1digit then switching is going if not then meter shows full dc volt check component near about that

Apr 13, 2010 | Lambda 40-Watt Power Supply

1 Answer

Power Up Problems


7 blink error is 8.6 volt error on that model. usually tied to y sustain board located on left side of set looking from back. disconnect y main from power supply and power on and if comes on verify power supply primary voltages located on label on pdp itself. if voltages present you would need to replace that board as not designed for component level repair. however if you find failed components like swollen caps or burnt ic's you could replace those. also when replacing the y main board there are two y buffer boards to left of main board that also would be recommended to be replaced at same time as they work as circuit and replacing one board without other could cause failure to other boards still in set

Aug 13, 2008 | Philips 42PF9431D/37 TV

1 Answer

Philips 42PF7220A/37 Chassis Number BP2.3U


I think its something on the picture frame board or on the line output board. I would sway to the line output simply because I think but not sure that error code is linked to the line output stage plus when you unplugged the cable the voltage seems within parameters. Good luck.

Aug 04, 2008 | Philips 42PF7220A 42 in. Plasma Television

1 Answer

Projection TV keeps shutting off


Good Day, checho3435;

Try this to help to narrow it down:

This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. SELF- DIAGNOSIS INDICATE X-RAY. CHECK FOR A SHORTED IC5A03 PART # 270P704010 AND AN OPEN R5A73 82K ¼ WATT OFF PIN 2 OF IC5A02 ON THE MAIN PCB. 2. SELF DIAGNOSIS ERROR INDICATES SHORT PROTECT. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT. 3. SELF-DIAGNOSIS INDICATES SHORT PROTECT. CHECK FOR A SHORTED IC4B01 PART # 270P261020 (VERTICAL OUTPUT) LOADING 24-VOLT SUPPLY LINE. LOCATED ON THE MAIN PCB. Good Day, big IRISH. back.gif

Jul 30, 2008 | Mitsubishi WS-55807 TV

1 Answer

NO PICTURE


7 blink error on that model is 8.6 volt error and generally caused by y main board. disconnect y main from power supply and if tv does not shut down and vs voltage comes up (test point on power supply) replace y main and both y upper and lower buffer boards as replacing one without other two could cause additional failures

Jun 26, 2008 | Philips 42PF9630A 42 in. Plasma Television

2 Answers

Turns on but not picture or sound. Power LED blinks


Your set might not be producing the high voltage it needs to light up the screen , it might be missing the supply voltage the supply volts to the output transistor ,if this voltage is missing is because the transistor is likely bad(shorted) and it has opened a fuse or a safety resistor.If you are familiar with tv service you have a place to check but you are not too familiar be safe and call a professional,high volts circuits are dangerous.

Oct 16, 2006 | Akai PT4298HD Rear Projection Television

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