Buzzing sound w/no pic or sound, lamp light comes on

that buzzing is the high end power trying to turn the lamp on.... the electrical current and shock is what turn your lamp on your tv which is what the buzzing is dont worry thats normal...however your solution is buy a new lamp for your tv but make sure its the right serial number for lamp u cant just buy any lamp. best place to buy one ebay.... as in the lamp still trying to light up its only because the electrical current going into the lamp and then cutting off causing the red light on your tv....so other words all it is is the lamp... CAUTION!!!! those lamps get up to 400 degrees unplug tv to ensure no electrical current.... hope i helped.... JACOB WINKLER

Lamp or ballast bad. If ballast good and lamp bad, will here a mosquito buzz every 15 secs. after turn on.

It may be the ballast....

Hello!
Lamp or ballast(if lamp has been replaced) is bad.
Explanation: green comes on: system works, waiting for light to shine into light engine: no light is coming out of lamp, system shuts down, then you see red! how to determine: pull the lamp out of the unit's compartment. Inspect lamp: bloated stem? shuttered? reflector is not shiny? Chuck it!
Lamp looks good or just been replaced: try ballast. Close lamp compartment without lamp itself. Make sure, door is shut, as well. Turn unit on and listen close to lamp compartment: good ballast will make a buzzing noise, then stop. You've got "red'! No buzzing: ballast quit. Needs major repair! Lamp must be good, for sure, to get to the last part of diagnostics. Conclusion: more, than 2000 hours of usage: replace lamp first!
Good luck,
Alex.

The lamp is going bad. If it was the thermal fuse it would not be intermittent. It is very common for some Sony sets like yours to do exactly what you describe when the lamp is going bad.

My Sony lost its picture and had a flashing light. Unplugging for 36 hours solved the problem.

You are hearing the spark gap mounted on the lamp ballast board. If you can hear that sound, that means everything in the lamp driver circuit is working except the lamp!

Get a new lamp.

michtech

if your looking through the vent at the backside of your lamp cartridge if the sparks are coming from the right side thats where your ballast circuitry is on that small circuit board the wires may not be properly connected or you may need a new ballast let me know if I can help you any further but before you go any further since its a hard chassis to get apart you may want to consider getting a service manual if you do just post me a model number and I can supply a link for you and they also give free online tech support with the manuals

sounds like your ballast is bad let me know your model number and I should be able to help you

The buzzing is the ballast for the lamp trying to light the bulb. From what you've described it is a lamp failure. It's not that hard to change but you'll have to obtain a new lamp first. You can try and buy it from LG (800-243-0000) but I'm not sure if they'll sell to a consumer. Then you have to reset the lamp timer after you replace it. Hold the mute on the remote and the enter button on the tv at the same time for about 8 seconds and a screen will come up asking if you want to reset the timer. Just follow what it says to reset it.