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I have a lg 47lb5900 tv screen flashes on and off II replaced pwr supply led driver brd still does the same thing

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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dodgecharger
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SOURCE: pc no start.........

You might have a bad power supply. If you have a voltmeter, check the voltage of the standby power supply. This voltage is present even if the system is off, plugged in. It powers a small portion of the logic circuit. It should measure within a couple of tenths of exactly +5 volts. If it is low, or high, this will prevent turn-on. The purple wire of the 24 pin connector is what carries this to the motherboard. The color coding layout is found at http://pinouts.ru/Power/atx_v2_pinout.shtml If by chance this voltage is OK, then check the full on voltages also. Repair of the defective supply is probably by replacement of one or more small electrolytic capacitors in the appropriate circuit, especially if you are technically savvy. Capacitors are available through several suppliers; Digi-Key supplyies Panasonic FC series which are suitable for switching power supplies. Or, you may just replace the whole unit.

Posted on Apr 25, 2007

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SOURCE: LG 50 IN. PLASMA TV MODEL # 50PC1DR . POWER

Power supply board is dead,replaced the power supply board will get power.

Posted on Jan 27, 2010

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SOURCE: have a Vizio VW32L HDTV10A

is 3,3v,5v and 12v power supply

Posted on Feb 20, 2010

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SOURCE: replace lamp led light

Have you reset the lamp timer?
Was the lamp module sitted properly?
Remove the back panel and vacuum all the dust.
Also use compressed air to blow out the dust from the inside.
Do not blow into the fan on the right as that will get the dust inside the lamp housing.

Posted on Mar 08, 2010

bhatgiri73
  • 106 Answers

SOURCE: nec pf-68v21 pwr led flashing red green after horizontal output

check the supply at horizontal driver trans former ,if voltage is correct at ho/driver trasistor ...then check allthe fusible resistances from power supply,,,if tv is taking h/oscillation for awhile ,,give more screen control in lot,,, & see for a horizontal line ,,,before tv becomes off,,, if so vertical ic problem...

Posted on Mar 16, 2010

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Have a Emerson LED tv model LF501EM5F that wont power on completely Starts to pwr on then after 3 sec shuts off I have replced the power brd, main brd and the IR sensor and still does the same thing.


Try removing the LVDS cable that goes to the Tcon board and see if the set stays on, you won't have picture but does the sound stay on...if it does then replace the Tcon board, the only one you haven't replaced it sounds like

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LG 47LB5900 TV picture blinks on and off. sound ok, does it on all menus, not just content.


T con board is responsible for the final image that appears on set. If there are anomalies or issues with it they can be traced to that board.

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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How to fix a lg tv 47inch with black screen no pictur 47LB5900 model


The red light merely indicates power is getting to your TV. There may be an open internal fuse or power supply failure.

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How to fix LG 47LN5200 TV?


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

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LG 42LD560 LCD TV


mainboard failure
I suggest you change tha flash memory .
This would be the first thing to try

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Nec pf-68v21 pwr led flashing red green after horizontal output


check the supply at horizontal driver trans former ,if voltage is correct at ho/driver trasistor ...then check allthe fusible resistances from power supply,,,if tv is taking h/oscillation for awhile ,,give more screen control in lot,,, & see for a horizontal line ,,,before tv becomes off,,, if so vertical ic problem...

Mar 16, 2010 | Televison & Video

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