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LG RE44SZ21RD - Ballast problem???

Today when my girlfriend came home and turned on our tv (LG RE44SZ21RD) she also turned on the AV amp. I think by misfortune they both tried to kick in at exactly the same time and drew too much current for our RCD throwing the trip switch.

I switched the TV to off, then reset the trip switch, then turned the TV back on. The tv came into standby fine (red LED illuminated as usual) and when I used the remote to turn the TV on that seemed to work too... The green LED flashed several times then stayed on. However, I get no picture.

Let me stress: The TV does not turn itself off after a certain time or give a flashing amber LED - ie protection circuit is not activated (so as far as the TV is concerned everything is fine).

The problem is that the lamp is not illuminated at all. I decided to check if the lamp had blown by replacing it with one I know works. (I replaced my old lamp when it got to 6k hours despite the fact it still worked - so I used this for a test).

So I guess the next most likely fault is the ballast board. The one in the TV is an OSRAM board - 3757790027. LG part number 6316000002D.

What I want to ask you guys is... is the ballast likely to be the problem? what is the procedure to test the ballast board?

I am a physics phd student so I have some electronics knowledge and have some lab equipment available to me.

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6 Suggested Answers

  • 1 Answer

SOURCE: Turns ON than right back OFF!

Yup, same problem here.

Posted on Feb 28, 2008

  • 8617 Answers

SOURCE: ballast replacement

Your set uses the Phillips UPH100W 1.3 100 1amp bulb part number 6912V00006A which uses Ballast EUC 6913V0002A and the actual ballast isMB03CA part number 6871VSMB13F I would contact LG and give them these numbers. Is your ballast bad or is the BallastEUC bad? Let me know if I can help you further.

Posted on May 12, 2008

  • 98 Answers

SOURCE: Mitsubishi WD-52525 Lamp ballast

Contact Mitsubishi Parts themselves, 18005537278. They are very friendly.

Posted on May 15, 2008

  • 1 Answer

SOURCE: Need to buy a lamp & Ballast

Posted on Dec 20, 2008

  • 2 Answers

SOURCE: Cant find a ballast

The ballast is actually a switch mode power supply that powers the lamp. It is an
integral part of the light engine and is not replaceable. The light engine has a price
tag of $950. If you replaced the lamp with an after market one and not the Toshiba
lamp you can experience the same problem. Some of the after market lamps will
not fire at the same voltage as the Toshiba. The blue led will come on solid and the
yellow blinking. It will try to start 8 times then give up.


Posted on Dec 31, 2008

  • 49 Answers

SOURCE: Samsung HLP 4663W DLP TV

If you have already replaced the lamp and ballast, to no avail, then it is time to take it in to a certified repair center.  Most will charge a nominal diagnostic fee.  My 61" did the same thing and it turned out to be the Light Engine (of which the DMD Board is a part).
If the problem were the color wheel, the lamp would come on for a bit until the color wheel sync couldn't be achieved and then it would turn off.  The all-3-flashing-lights problem is the lamp.  Here is a page from the service manual on the 3 blinking lights problem.  
The Light Engine controls the ballast via a separate signal than the 320 Volts.  The voltage reading means that the Power Board is working properly.

Posted on Jan 24, 2009

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My LG projection tv (serial number 52sx4d-ub) won't turn on, an orange light flashes then turns red. How do I know if I need to change the bulb or the ballast? And how much does it cost to change the...

Orange blinking light under a small picture of a light bulb? Then turns to a red light?
Sounds like the same problem I had when I picked up my LG 52SZ8R. After replacing the lamp the TV ran fine.

Easiest way to see if the lamp is the problem is to take it out, and look at the peice of wire in the globe as you would an old light globe.

If you need help, download the following manual, and look at page 9.

If it does come down to you needing to replace the ballast contact:
They should be able to give you a quote and part number, if you don't like their quote you can always use the part number to search for one thats cheaper.

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Had similar problem. Thought it was the lamp. Examined old lamp but it appeared to be good. Ordered a new one anyway. Changed the lamp but the TV screen would not come on. It would make the usual noise as it was going to come on normally but it would cycle 3 times & then turn off. The LED lights in the front panel would indicate a defective lamp. Then read about the ballast. Changed the ballast & still same problem. Tried starting the TV without the lamp installed & noticed that the color wheel did not spin. Removed old color wheel & discovered it was broken. This appears to be the cause of all of my problems. I wish I new earlier of the test-turn on the TV without the lamp being installed & check to see if the color wheel is spinning. Would have save money on the lamp & ballast.

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It might be worth checking that you haven't accidently activated the tv's sleep timer, I did on my LG DLP !!. always check the obvious first.

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All I can suggest is to replace the bulb. I experienced a similar problem after about 2 years viewing when the recommend lamp life was approx 8000 hours (I got to approx 3000 hours). There is a service menu you can access where you can reset the lamp hours time. I have read that if this is reached you must replace your lamp, but you can extended this by reseting the hours.

I have since learnt that a lamp bulb can go at anytime, so it is worth having a spare. Also I have noticed that switching the TV off at the switch (not leaving it in standby helps).

Try this to access the service menu. Holding down the menu button on the remote and the one on the TV for a few seconds. I think the TV needs to be off.

From memory, I think it is option 4 and option 5, then reset the lamp hours to zero

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You can purchase the service manual for your model at the following link and they will provide free tech support to help you diagnose and locate any parts that you may require. they email the service manual almost instantly after putchase. heres the link look under the LG section for your manual.

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My REsz21rd is doing the same thing, switching off after a short time and then struggling to re-start. The LG repairers say it's the projection engine and have quoted £2000 for a new one. What a joke!

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