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Start-up failure. switch on at mains power light is on but when try to boot tv up lights flash and then stops and no picture or sound.

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Check all connection on the tv. could be some loose connection or into a signal.

Posted on Nov 09, 2008

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Try first unplugging the TV for 20 or thirty minutes , see if this can reset the unit.

If the TV does not restart, then it means that there is an internal fault, often a pproblem with the power board.

Posted on Nov 09, 2008

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1 Answer

My technika lcd40-920 tv wont turn on standby flashing blue to red i held power in 30secs n stopped flashing but still wont turn on why some one said its trying to update but not sure can u help


How long have you had this TV? If it is under 12 months, get it fixed under the guarantee. If you have an extended warranty, use that to get it fixed.

I would suggest that you switch everything off, remove all the cable from your satellite box or games console and everything else, then switch off at the mains and unplug the set.

Now press and hold the power button on the TV for 30 seconds.

Now plug the TV into the mains again and use the TV button to switch on the set. If the lights continue to flash, then it's a repair job. If the lights are steady but there's no picture, then switch it off using the TV button and reconnect the aerial cable first and try it again.

Once you get a picture displayed, you can begin to reinstall all of the other cables until everything is working again.

Apr 13, 2015 | Televison & Video

1 Answer

How to determine if power board on emerson tv model lc320em1 is shot


The power supply regulator board to your TV is now working fine, and has no problems at all, as, there is standby light. Check all the other voltages comes out from the power board, to main board. If all of it found OK, the fault should be at its main board.
About blinking of standby/power light;
These blinks (flashes) are fault indication. By the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit stage inside the TV. Count the blinks occur at one time switch ON, carefully. Do it once again, and make sure about the number of blinks. If the flashes are continious, non-stop, the main system control IC should be suspected. If you wish to get more details, check the site linked here. It has blinking codes detail to many brand TVs. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/

Jan 19, 2014 | Emerson Lc320em1 TV

1 Answer

Blue light flashing no picture or sound


Sounds like a main board problem, I've worked on quite a few Sanyo's and their main boards are notorious for failures.

Jul 23, 2012 | Sanyo 42 in. LCD TV

1 Answer

Flashing green light


Did you try this yet

SYSTEM RESET
If the TV will not respond to either the remote control
or the front panel controls and/or will not power Off,
press the SYSTEM RESET button with a pointed item
like the end point of a paperclip. The TV will turn Off
and the TIMER light will flash quickly for about one
minute. When the TIMER light stops flashing, you may
turn on the TV again. Changes you made the last time
the TV was On before you used the SYSTEM RESET
button may be lost, however, the changes you made
previously are not lost.
POWER/TIMER Indicator
The green light is a multi-function indicator. This light
will flash rapidly for about one minute each time the TV
is plugged into the wall electrical outlet, when power
is restored after a power failure, or using the SYSTEM
RESET button. Do not attempt to turn on the TV again
during this period. Wait for the flashing to stop and
the light to turn off, before attempting to turn the TV
on. While the TV is powered on, the light illuminates
steadily. If the TV has been programmed to turn on
automatically using the Timer feature,

Sep 21, 2009 | Mitsubishi WS-65515 65" TV

1 Answer

Sony grand wega turns off & o ever 30sec flashes green light


it's a power failure.try to replace the regulator in power supply board.

Sep 04, 2009 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Red light flashes on power switch, but no picture or sound on tv


tv will not power on. red light on switch blinks. power relay clicks, but no picture or sound.

Jul 28, 2009 | Toshiba DVD Recorder AND Series2 TiVo...

1 Answer

Red light flashing, no picture/sound!!!!


HI, this unit has 3 main fuse links on the main board that may be blown. the fuse links should be check before you move further into the diagnosis stage. once you have checked the fuses and they are still in a working state, this will confirm a power supply board failure. this board provides and regulates the current flow and distribution of it throughout the entire unit. If the fuses are fine and the power supply board is damaged, the green light will come on briefly then, the main control will notice that the power supply is not functioning properly. Once the main control board senses an abnormal current, it will shut down the TV rendering the red light warning. The list of fuses to check are below. Remember, if they are fine and working, the issue will be the power supply board itself and, it will need to be replaced.

FUSE CHECK LIST--

3A 12v- fuse----(242208600623)
SM 3A 125v-fuse----(242208600657)
500 MA-fuse-----(242208611092)

PART NUMBER FOR POWER SUPPLY BOARD

(996500036816)


Please rate and god bless:)


Apr 13, 2009 | Philips 42PF9631D 42 in. Plasma Television

1 Answer

Red standby light flashing no picture or sound


the power supply is faulty, check the following

power trasistor
rectifier diodes
zener diodes
fusable resistors ( less than 20ohms)
and your set will work again

Apr 07, 2009 | Sony FD Trinitron WEGA KV-24FS120 24" TV

1 Answer

Only power light will power on for few seconds then flashes.


Does the main lamp light at all? It sounds light a cooling fan failure. If the fan iis not working the the main lamp will not turn on and the power light will flash.

Jan 07, 2009 | Optoma EP755 Multimedia Projector

2 Answers

Blinking red light


If your Sony TV is hooked up to a good signal and is set up correctly, but only clicks and has no picture or sound, and even the menu will not show up on the screen, then it means that the main power supply has stopped working. I usually find that a small crack in the solder joint of the horizontal drive transformer or a shorted flyback will cause the large horizontal output transistor to short out, and this shorts out the switching transistors in the main power supply which then causes the Sony 0.1 ohm fuse resistor to open up. I have also seen power surges or power failures (brown-outs) cause the switching transistors to short out. In any case, the set absolutely should be serviced by someone experienced in repairing Sony TV's.

Aug 05, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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