Question about LG HT503TH Theater System

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Wont power up from standby

Havent used the unit in a while, went to turn it on, and nothing happens. Can see the standby red light under the power button, when pushed it flashes but the unit doesn't power up. What is wrong?

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Posted on May 13, 2007

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SOURCE: LG LCD TV Standby Light Flashing Red Continuously

I have had this same problem twice in the past 3 months. So far both times I've been able to get it back after a week or two. I'm not sure what works, but unplugging and detaching the antenna and cable and waiting a few days seems to be the key. In both instances, I unplugged it for a few days then plugged it in for a few days and repeated the processes until I eventually got the steady red led. Both times prior to the red led the led would flash red then green and make a clickiing noise for several hours before I was able to get it working again.

Posted on Apr 22, 2008

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SOURCE: tv won't turn on. red power light is out

red light is on, but when the tv is turned on, it immediately shut down and goes back to the red light setting. It is like it blows a fuse or something to that effect.Post Solution

Posted on Mar 28, 2010

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SOURCE: tv wont turn on

Hello Charliebigwh, hi technically your monitor's power supply has a problem, this is either your switching regulator does not work or there is a short in that section, If you want to do it your self, need to replace all large value, and or high voltage capacitors(especially the capacitors with its top is bubbly), need also to replace the switching IC, and power transistor.

Have it checked by a technician if you cannot do the work.

Posted on Apr 15, 2010

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budmrtn
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SOURCE: screen won't turn on - power button continues to f...

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed LG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Posted on May 22, 2010

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1 Answer

Sony dab fc7 wont power on


Two thing here.
#one the internal fuse has blown unlikely as the standby light is powered.
Two the power supply unit or switch is faulty.

get some one electrical component with the unit unpluged open the case and check any internal fuses have not blown.
Two check capacities on the power board these are large cylindrical shaped objects. These can dry out and or exploded if faulty relatively cheap to replace.
Second check the power switch actual powers the unit again someone with a multi meter and electrical compertent.
It is probably worth replacing either a capacity or switch anything else may prove false economy
I have replaced power board on other units but to be honest unless the unit was very expensive I would buy new

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We were watching our TV and there was a "pop" and the screen went blank. Now when I try to turn it on nothing happens, the standby light switches to red and no picture comes up at all. What happened??


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur. The "pop" you heard was probably a Capacitor has literally "Blown Up". Due to a power problem.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

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Tv went off while watching a program power standby red light blinks 6 times then pauses then repeats tried unplugging unit waiting a few minutes then replugged same results nothing. can anyone help me ?...


Here's an excerpt from the Sony Manual online. And the link - http://esupport.sony.com/US/perl/webtree.pl?template=EN&mdl=KDF55XS955&content_id=68&category_id=11&problem_id=52

The POWER/STANDBY (red) indicator flashes three times
If your power/standby indicator is flashing in a pattern of three flashes, this may indicates that the lamp cover is not attached securely. Follow the directions in the Operating Manual under changing your lamp that related to closing and securing the Lamp Cover. Ensure that the Lamp Cover Door is securely fastened by tightening each screw.

The POWER/STANDBY (red) indicator flashes continously
If your power/standby indicator is flashing continuously, and the lamp cover has been secured, your TV may be in need of service.

The POWER/STANDBY indicator is lit up green (not flashing)
A sustained green light indicates your TV is on.

The POWER/STANDBY indicator is lit up red (not flashing)
A sustained red light from your power/standby indicator simply indicates that your TV is in standby mode. This shows you that your TV is ready to be turned on with the remote.

Is it the power light and not the lamp light? If the lamp light is flashing then replace the lamp.

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1 Answer

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ok go to youtube and type" PS3 REPAIR/FIX" basicly what you do is put the ps3 on standby (the red light on) and then turn the main power off (the back switch) then hold the I/O button in the front (the on switch you use to put on standby) just hold it until it will go to standby then hold the I/O button again (the standby button) and then keep holding it until you hear one beep, then wait for two quick beeps. Then there should be a menu and select "Restore Defualt Settings". If it dosent work CONTACT SONY!

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1 Answer

AKAI LCT3201AD


Find and replace the following caps, Ec18, 19, 20 / 1000uf/16v,
Ec9, 10 / 1000uf/35v, Ec14, 25 / 470uf/35v should resolve the problem. You can get the caps at almost any electronics supply.
This is a common problem in this unit.
Good Luck!
Happy Thanksgiving!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

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AKAI 32" LCD HDTV WILL NOT TURN ON


The only solution at this point would be to get the power supply repair since new boards are not longer being manufactured. In about 95% of the time if the LCD doesn't power up or turns OFF by itself or need to be unplug for some time to make work again; those are the symptoms of a dying or defective power supply.
I service these power supplies, for more info write to jah2mil@hotmail.com

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The blinking red light at the the front of the television is the "Diagnostic STANDBY/TIMER LED".
This little red light will blink 2, 4, or 5 times and then stay off for three-seconds. And blink again for 2, 4, or 5 times. This cycle repeats. The most common diagnostic code is the 4-blink code.

When the red LED blinks 4-times, it means one of two possible causes:
1) +13V is not supplied on the A-board. Or, 2) IC502 is faulty.

It is best to take this television set to a repair facility and ask that the +13V power supply be repaired.
The copper tracks and integrated circuit pads are very thin and delicate on the KV-24FV12 circuit board, and will easily lift off of the circuit board, if the incorrect desoldering tool is used. Unless one has a good quality PACE vacuum desoldering unit, one should not attempt to repair the television.

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1 Answer

Havent seen tv in over a week


The lamp may have went out. or maybe just got confused from button pushing. Have you tried unplugging unit first then plugging back in? Let me know what happens there then we can proceed further. Thank you and see you soon. Jay

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