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Fail light on controll board

Trying to fix a cnc controll board bn634a646ho1 rx21111 c have red led fail light cant find schmatics

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Ther may be codensation unplug from the wall & leave for about an hour and retry

Posted on Apr 23, 2009

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6ya6ya
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Posted on Jan 02, 2017

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LG LED LN5200 3 LED strips flash 3 do not. I do have sound and can see screen with flashlight and red power LED flashes 3 times.


Back - light problem. 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. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Dec 25, 2016 | LG 47 Inch LED TV 47LN5200 LN5200 Series...

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PANASONIC VIERA TX55as802b will not switch on red power/standby light blinking once every 3-4 seconds have been told its the screen and it cant be repaired can anyone confirm this or help.thanx


The manual says nothing about the power light flashing at that rate. Unless an expert tells you that's the specific indication for a failed screen, I wouldn't believe it. Most TV's will give you sound even if the display has failed.

Try resetting it by unplugging and waiting 60 seconds before plugging it back in.
If that doesn't work, most likely the power supply board needs to be replaced. Or possibly the T-con board.

If you don't know what you're doing, DON'T OPEN THE TV UP TO FIX IT, THERE ARE HAZARDOUS VOLTAGES ON THE POWER SUPPLY BOARD, EVEN WEEKS AFTER THE TV IS UNPLUGGED!

If you don't know how to do it yourself, find some local Electronic repair shops, get quotes, try to find reviews on the shops.

Sep 20, 2016 | Panasonic Televison & Video

1 Answer

Apc smart ups 2200 all led flashing 3 orange 2 red 1green,what is that? and How to Fix It?


Hi,
this problem is caused control board with that. the solution is replacement.

Jul 21, 2014 | APC Smart-UPS 2200VA LCD 230V...

1 Answer

42LH90


How long have you had your LG TV? LG had a problem with a chip on the main board in the fall of 2012. Most units have failed by now, but if you only watch your TV occasionally, this could be the problem. The symptom is this: Plug TV in, red LED on front lights up. Try to turn it on, red LED goes out and stays out (should flash and turn blue). Hope this helps. BTW, if it is the chip, and you're handy with a soldering iron, you can buy a new chip online for less than 20 bucks and install it yourself. A main board (with the fixed chip) is about $150.

Feb 10, 2014 | LG 42LH90 42 in. HDTV LCD TV

1 Answer

Red light on control comes on and off and fan speed has now stopped working


You must to exchange battery for remote control 2) clean your contact with special clean contact.3) see if some wires is loose or desolder.4) Try again.
If the problem persist, you must shure the electronic board is faulty.Repair or exchange.

Dec 12, 2011 | Fanimation C23 White Fan Control Remote...

3 Answers

TV won't turn on - no picture or sound -and the 3rd of the 3 LED lights on front of TV is flashing red


HI, this is a failed power supply board. simply replacing the failed power board will fix this issue.

Jun 18, 2009 | LG RU-52SZ30 52" Rear Projection...

2 Answers

Need schmatic for ep2500


check preamps small parts! maybe you have change value capacitors and resistors!

Sep 13, 2007 | Behringer EUROPOWER EP2500 Amplifier

1 Answer

Whirlpool Duet Dryer GEW9250P (electric)


Here is a list of possible causes. NONE OF THE LEDS LIGHT... Check to make sure that ribbon connectors P3 and P4 are inserted all the way into the machine control electronics board. (To access the machine control, pull the dryer away from the wall and remove the three screws from the top panel on the back. Slide the top panel rearward about 1/2" and lift. The machine control is on the left hand side. P3 and P4 are the "ribbon" connectors going into the board.) A PARTICULAR GROUP OF LEDS DOES NOT LIGHT... A group or combination of LEDs share a common electronic connection. If this connection is open, all of the LEDs in the group will be disabled. If this occurs, replace the entire console electronics and housing. ONE LED DOES NOT LIGHT... Press the button associated with the LED several times. If the LED does not light, the LED has failed. Replace the entire console electronics and housing. NO BEEP SOUNDS... If the associated LEDs do light up, the beeper circuit may have failed on the machine control electronics board. NO DRYER FUNCTION IS ACTIVATED WHEN A PARTICULAR PUSHBUTTON IS PRESSED... If the associated LEDs do light up, the machine control electronics board may have failed. AN E3 ERROR CODE IS DISPLAYED... An E3 error code means that there is a user interface or a software mismatch. It can also mean that a component on the console electronics,or the machine control electronics board has failed. Hope this little tutorial gets you where you need to go. Let us know how it turns out, will ya?

Sep 13, 2007 | Whirlpool GEW9250P Electric Dryer

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