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I have an HP LC3760n which uses sharp power supply LC504-4201cc. The power indicator flashes green. I replaced the power supply, same issue. I tried the procedure of remove power cord, hold power button 10 seconds, plug power cord, no change. Next procedure - remove power cord, hold vol + chan - at the same time while plugging power cord. Now TV powers on and shows channel in upper right screen, but no 'K' in middle of screen and pressing the remote chan + has no effect on displaying or clearing error codes. I now have volume, but no picture, and able to change channels & volume, and remote is active.

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Did you ever get this resolved?

Posted on Mar 28, 2011

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Tv powers on with pic and sound for 3 sec then off with green power light flashing.


That sounds like the safety shut down for the power supply board kicking in.

You could shotgun repair it by replacing the board but without a manual it's a bit like shooting in the dark and I can't find the repair manual out there, but here's and idea of the component modular board costs.

http://www.shopjimmy.com/hp

Apr 14, 2015 | HP LC3760N 37 in. LCD HDTV

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Sharp LC -46SB54U will not turn on. The green power light flashes twice, then the green power light and green OPC light flash once together. This pattern then repeats itself over an over again. The tv is...


Hello,
Power supply board just die.It can be dead at anytimes.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Do take care.....

Jun 16, 2011 | Sharp LC46SB54U 46 in. LCD TV

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Power will not turn on, but there is a green light flashing in the front of the television


Change the power supply board - LC504-4201CC 161WJQZ is the power supply board for the LC3760N TV

May 10, 2011 | HP LC3760N 37 in. LCD HDTV

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I cannot turn on the HP Pavillion1450. Green power light flashing at rear.


The power indicator light on the back of the Power Supply flashing when power cable plugged in, indicates a problem with the power supply. There is a short somewhere in the wiring. It will need to be replaced.

Apr 11, 2011 | HP Computers & Internet

1 Answer

The green light on the back is flashing, but when I push the power button nothing happens, any ideas what it could be?


The Green LED light flashing indicates a bad Power Supply. Weak voltage power rail.

http://h10025.www1.hp.com/ewfrf/wc/product?product=404643&lc=en&cc=us&dlc=en&submit.y=7&submit.x=7&lang=en&cc=us

Troubleshooting Power Supply Issues HP Pavilion A520n,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&tmp_task=solveCategory&lc=en&dlc=en&cc=us&site=null&lang=en&key=null&product=404643#N207

Click on > Power Supply light is on or flashes

"If the LED is still flashing (it should not flash with all connectors removed), plug the power cable into a different power outlet that is known to be good. If the LED still flashes, the power supply should be replaced."


Cause?
The leading cause is the computer is dirty inside, to include the Power Supply
The next cause is that Electrolytic Capacitors have failed inside the Power Supply.

Solution is to replace the Power Supply.

The Power Supply used is the ATX form factor. The type of Power Supply used in over 80 percent of PC computers out there, and very readily available.

Size of the power supply case is approximately 6 inches Wide, 5-1/2 inches long (5.5), and 3-1/2 inches Tall. (3.5)

It is a 250, or 300 Watt generic unit, probably made by Bestec, Delta, or HiPro.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00072236&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=404643

Scroll down to see the illustration and photo of the motherboard.

Power cables needed are;

A) 20-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

{ ATX power supply's today come with a 20 + 4-pin ATX main power cable.
The power cable can be used as a 20-pin, or a 24-pin.

Add the 4-pin connector to make it a 24-pin, or do not use it, and have a 20-pin }


B) Enough standard 4-pin Peripheral power cables for the IDE (PATA) harddive, {1}, and the optical drive/s.

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

Today's power supply's come with either at least 4, or 6 of these power cables.

C) One Floppy Drive power cable.
Won't be used for a Floppy Disk Drive on your computer. It's power for the Memory Card Reader.

http://www.playtool.com/pages/psuconnectors/connectors.html#floppy


All of the above power cables are typical when purchasing an ATX power supply today.
Need guidance in choosing a Power Supply, please state in a Comment.

Regards,
joecoolvette

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2 Answers

Bestec model atx 250 12z flashes green when hp pavilion a706n is powered on light on back blinks green and pc does not power on even after all cables are disconnected


Try these suggestions:

<a href="http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&cc=us&lc=en&dlc=en&product=427167&dlc=en&lang=en#bph06788_section_2" >Troubleshooting Power Supply Issues</a>

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1 Answer

LC3760N power light blinks


Replace the whole board,LCD usally the IC is dead,not like DLP the capacitors,burn most of the time.

Sep 22, 2009 | HP LC3760N 37 in. LCD HDTV

1 Answer

Tv (LC3760N) shut off blinking power light will not turn on


I had the Same issue. on a 50PF9431D/37 set. Many Plasma Set's use a LJ44-00118A PS-505-PH Power supply from Samsung. Known to have this common problem. If you can, or have a friend that can Solder components?. Unplug your set remove the back panel & locate your power supply. It will be the PCB in the center of the set just above the Video/Audio connections. http://www.shopjimmy.com/power-supply-unit-lj44-00118a-from-philips-50mf231d-40.htm. Is a Link to a photo of the PCB. Make a note of the locations of all cable connections then unplug them all. Un-install PCB, Check all Fuse first. I believe their is 5 or 6 of them on the PCB. Then replace the two 3300uf 10v 105C Radial capacitors at C8060 & C8059. Look to see if the Caps are deformed and or split at the top. The location of the caps are in the Lower bottom edge of the PCB. A local shop may Carrie them if not, digi-key has them. Part # http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=493-1754-ND. Total cost was $7 with S/H.

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Sharp AL 1631 Grayscale Copier Problem


Have you tried removing all cable connections on it and turning printer off and unplugging it from power supply and powercycle?

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10 Answers

Computer will not power on


Regarding the blinking green light on power supply for hp a430n...I've had that happen as well when the computer is turned off for an extended period of time. It would not immediatly power up when plugged in to power. Hitting it and beating on the button didn't help either.

However, after calming down, I noticed that when I unplugged the computer that the light continues to blink, but gradually fades and goes out. So, I thought that since power supply holds a charge after being disconnected as can other components inside a computer that I would assume the converse: It needs to power up to "full charge" as well. In my case, I was right.

All I did was plug the computer in and leave it alone for about 20 to 30 minutes, go sit and cuss for a while. When I came back and checked it after that time, the front panel blue light was on and the green light on the power supply was glowing steady. The computer started right up! Thank goodness...stopped cussing.

If it hadn't, and I had tried all the resets listed above, I would have bought a new power supply too...but not this time!

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