Tip & How-To about Televison & Video

Ballast Diagnosis and Replacement in LCD Projection TVs.

When you have replaced the lamp in your LCD projection TV, and you still get lamp warnings and blinking standby lights or the light levels are extremely low, compared to the old lamp, your ballast probably needs replaced. Odds are it shorted out or developed problems when the old lamp failed.

This is not a hard unit to replace on most sets but may require a little knowledge and familiarity with LCD units. The ballast makes the voltages for the lamp circuit. The ballast is generally located near the lamp and has two large soft rubber wires going to the lamp assembly. If you follow the wires from the back of the lamp, the box they lead to is the ballast.

Replacement of the ballast involves removing any screws holding the cover on and the board in the TV. Disconnecting any wires from their plugs. Mark them with a sharpie prior to removal for easy assembly using a different number for each connector.

Reassemble the unit using the new board and make sure that all covers are in place and all wires are properly connected. You may be able to download a service manual at http://www.retrevo.com which will help with part numbers and has instructions on the removal and replacement of the ballast as well as diagrams and pictures to help with disassembly and reassembly. Retrevo does not have all service manuals. If you want one and are willing to pay about $16 US go to http://www.servicemanuals.net . The manuals can be downloaded instantly.

Any parts needed may be obtained at http://www.encompass.com or http://www.shopjimmy.com . http://www.encompass.com sometimes will have the service manual for free download. Again they do not have everyone and it depends on your model, but it certainly is worth checking prior to purchasing one.

When the job is complete your unit should be operational. If there are more problems try my tip at http://www.fixya.com/support/r4916941-diagnose_repair_projection_tv_high to troubleshoot the additional problems.

Good luck with your troubleshooting. If you need more help let me know.

Thanks for using FixYa and for the great rating. Please consider a testimonial. Thank You.

hardrocko

Posted by on

Televison & Video Logo

Related Topics:

Related Questions:

2 Answers

Sony LCD KF-50WE610 no picture-red light blinking


3 times standby red light blinking shows that lamp cover has not been placed back properly after lamp replacement.
Make sure lamp cover, (the first thing that you removed to replace lamp in tv) is fixed securely then turn tv On.

Jul 30, 2010 | Sony Grand WEGA KF50WE610 50" Rear...

1 Answer

sony wega kdf42we655 power led blinking red


If lamp light is on at tv front then replace lamp as existing lamp sounds dead/ broken.
Lamp replacement procedure would be written in user manual of tv.
And if lamp light is not on but standby light is blinking then let me know how many times it is blinking to find out problem cause as standby light blinking is an error code.

Mar 25, 2010 | Sony Grand WEGA KDF-42WE655 42" Rear...

1 Answer

the on lcd little light blink six time


The standby light blinks to indicate problems with the TV. Six blinks indicates an internal problem, I suspect with the lamp. I recommend contacting a Sony repair shop to vacuum out the TV and replace the lamp. Installing it yourself has no bulb warranty and you cannot vacuum it out without taking it apart. Lamps are $250+ each...

Mar 21, 2010 | Sony Grand WEGA KDF-60XS955 60" Rear...

2 Answers

Tv wont power up Standby light keeps flashing.


First step in any Sony LCD projector repair is bulb or lamp replacement. Fixes 95% of problems.

Taking apart and trying to measure things without a known good bulb is a waste of time and effort.

easyab

ConvergenceRepair.com

Feb 26, 2010 | Sony Grand WEGA KDF-60XS955 60" Rear...

2 Answers

Sony LCD Projection TV turning OFF.....help!!!


Look carefully at the front lights. Usually when these sets shutdown they have a blink code on either the standby light or the lamp light. Update this with those counts. In the meantime, you may be seeing a problem with heat. If the lamp area gets too hot, the set will shutdown the lamp. Once the area is cool again, the lamp will fire.

Update this and we'll hopefully fix the both of them.
Dan

Apr 09, 2008 | Televison & Video

Not finding what you are looking for?

684 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74482 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Loading...