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The set is dead found CP942 open on power supply board CP942 is icprotector N70 replaced with same

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Hi there,

It seems like there must be some other problem with the power supply,
so first of all check again the new installation..... 
I think you should need to change the whole power board with a new one.

Try checking a external power supply. (but first cut the internal one)

Post further comments for more help.

Thanks

Posted on Jul 14, 2009

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Dead set (no indication lights coming on when I push the power button.


Hi Gwendolyn,

First of all thank you for posting your question here at Fixya.
I'm assuming here that you're TV is a Vizio L32 HDTV.
My initial advice is to ensure that the AC source(outlet) is live. Please plug the unit to a known working outlet, if you are using a surge protector, directly plug the power cord of the TV to the outlet to confirm that the AC source is not the issue here.
If you've confirmed that the AC source is not the problem, then the fault is inside the TV and most likely the power supply. Most of the TV with a dead set symptoms that I've encountered is a power supply issue but of course needs to be confirm.

If your unit is not under warranty period (if so, avail it because the manufacturer will fix it for free, opening the rear cover will void the warranty), open the back cover, check the internal fuse of the power supply board, this is near where the AC power cord's directly connected. Check its continuity using the multimeter/ohmmeter, if you found it open, replaced it with a new same current rating that is printed on its body itself. Sometimes internal fuse fail due to voltage surge/flactuation, aging, etc, replacing with new one resolve the issue, however if the fuse blow again, this is an indication of more serious problem on the power supply board, it needs to replaced the entire board.
If the fuse is intact, you have to measure the output voltage of it through connector J1 (pin 9,10,11). You should be getting 5 Volts. If there's no voltage at these pin, you're power supply board is dead, replaced the entire board. If the 5 volts is present, replaced the main board.
I've provided you a links for the power supply board and mainboard below.
Vizio L32 Power supply board

Vizio L32 Mainboard

Let me know if you need further assistance.

Rating and feedback are highly appreciated!

Hope I helped you.
Good luck and take care!
Have a nice day!
Kind Regards,

Jdvillanueva

Dec 13, 2011 | Vizio L32 32 in. LCD HDTV

1 Answer

Panasonic tv will not turn on.


Hello,

All you have to do is to open the back cover of the television to check for blown fuses,if found replace with the same rating of the fuse. note that the power fuses are always located beside the terminal feeding the printed circuits board, if otherwise Your power supply board is dead, you know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Take care in solving the problem because there is high voltages inside the panel, do take caution when you are handling the television especially when it is open.....

May 07, 2011 | Panasonic Televison & Video

2 Answers

I heard small pop then lost power while watching my lg 50pg20. No red or blue lights on the power switch. What could be wrong?


you are describing a power supply defect. IT may be as simple as the main fuse. I believe the one in this set is a 6.5 amp located on the ps board right by cord connection. IF after replacing the fuse opens a second time you will need to replace the power board.
p[lease leave feedback

Feb 20, 2011 | LG 50PG20 50 in. Plasma HDTV

1 Answer

Lg flatron plasma screen tv keeps flashing on and off


Hello,

All you have to do is to open the back cover of the television to check for bulged capacitors, if found replaced with the same value, but if otherwise Power supply board have problems,just not dead yet.Replaced the power supply board,will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Good luck , hope this helpout

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1 Answer

My protron 42 lcd tv is not turning on the tv tries to power up and then it comes on and then just power down


Hello,
Open the back cover of the television to check for dry soldering , if found resolder and power it on , if otherwise,
Your power supply board is not yet dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope this helpout......

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1 Answer

Plasma tv shut off by itself?is it worth taking to the shop?


Hello,

You can fix this yourself, open the back cover of the television and check if there is bulged capacitors, if found replace with the same rating value, if otherwise,
Power supply board have problems,just not dead yet.Replaced the power supply board,will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Jul 02, 2010 | Televison & Video

1 Answer

Tv stays on 30 seconds and turns itself off


Hello,

Power supply board have problems,just not dead yet. open the back cover of the television and look round for bulged capacitors, if found replace with the same voltage rating , then if otherwise, Replaced the power supply board,will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Hope this helps......




Jun 30, 2010 | RCA HD61LPW42 61" Rear Projection HDTV

1 Answer

Television will not stay on. The indicator light


Hello,
first you have to open the back cover of the television to check for bulged capacitors,if found replace with the same number, but if otherwise
Ur power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get ur tv power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
Hope this helps....


Jun 07, 2010 | Panasonic Viera TH-42PZ80U Plasma TV

1 Answer

Dead TV


U know basic electronic's,and u know how to do soldering?Have soldering iron,tools and solders?The power supply board,the board that the power a/c power cord plug into it.That the power supply board have these parts call capacitors are dead.These capacitors alway bulges up on it top or puff on it top.Check all around the power supply board and it supporting boards.Replaced these dead leakage bulges up on it top or puff up on it top.Or tries websites like Shopjimmy.com,Ebay.com to buy and replaced the whole refurbish power supply board.

May 28, 2010 | Hitachi 32PD5200 32 in. HD-Ready Plasma...

1 Answer

Blinks twice pause blinks 4 times


SYMPTOMS
Dead or Shutdown symptoms.
RESOLUTION
Dead symptom reported to be caused by the following:
1. Dead.
Found Q601 & Q602 shorted, R615 open, and IC600 on the A Board were the cause of the symptom.

2. Dead.
Found D614, Zener diode, on B+ line was shorted.

3. Set shutdown and the standby LED blinks 3 then 5 times.
Found 200v line was low. Disconnected CN706 on the C Board and found 200v now
present on CN706/pin 7.
Found: IC702 (C board) shorted the 200 volt line.
HQ Comments: C541 on the A Board could become defective if the 200v line is shorted since
the polarity on the capacitor will become reversed. R553 fuse resistor could also be opened
on the A Board.

4. Error code of 4 blinks .
Dead set press power button you hear the relay and you see red led flash 3 times and stops? Has no HV or other action. Tech removed the back as no 200 volt supply, did unplug CN706 and now has 200volts. Tech did remove the IC702 and same it comes up so needs this IC.

5. Dead. 5 blinks then 3 blinks. Found shorted Damper diode D504. Q502 has a built in damper, as well.

6. The TV does not turn On and the LED flashers 9 times.
Found one side of R610 open on the Base of Q690 on the A board.

7. Dead, 9 flashes, Q606
Would not start when cold, has stand by 5 but relay never energize.
No response from front panel or remote controls.
9 blinks is not in service manual.

Found Q606 (Zero Det.), on the A Board, had no soldered on the collector
of the transistor causing an intermittent connection.
Soldered the collector of Q606 and set returned to operation.
HQ Comments: Also refer to E30968554.

8. Dead. 5 blinks or 3 blinks
Found on the A Board D611 in the Power Supply open, and Hor. Output Q502 shorted.

9. Found Power Supply components D611 shorted causing Q600, Q601, and R615
to fail on the A Board.

10. No picture or sound. Standby flashes.
Found Q512 (Pin Out) shorted. on the A Board.





11. Dead. No sound or picture.
Found the FBT and Q502 were shorted, and R615 open on the A Board.

12. Dead
No power, Stand by light flashes 4 times.
Found T604 and IC601, replaced.
Found D611 on the A Board was the cause of the symptom.

13. Dead.
Found D534 shorted on the A Board.

14. Shutdown 4 Blinks.
Replacing R595, OCP Latch Q532 on the A Board, fixed the set.
PN 1-247-891-00, 330K 1/4 watt.

15. Unit shuts down after 15 mins.
Immediate shutdown - sometimes it give a 3 blink, sometimes nothing.
Found R595 (330K) was open located in the Q532 OCP Latch circuit.
R595 P/N 124789100 330k 1/4w

16. Won't power up. LED Blinks 4 times, B+ is very low
B+ is at 49V, +15/-15 only coming up to about 1 volt.
Wth Hor Out disconnected B+ only comes up to 50v.
Found D611 on the A Board was the cause of the symptom.

17. Intermittently does not turn on
Found a intermittent C633 on pin # 3 of IC600.
C663 P/N 113647911 Film cap .001uf 100v



Billy

If you need the service manual contact me at:billyjones@fletchersite.com

Jan 27, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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