No Sound Unit Powers on but no sound. It usually clicks once when it powers on (which is still does) and then right before the sound comes on it will click again but now it doesn't make that second click henceforth no sounds. Sounds like something must have blown. Can anybody help me out w/ this? Thanks in advance. J

Look on the heat sink for a temperature sensor that operates the overload relay. . Make sure the heat sink isn't overheating. If it is then the output transistors are shorted.

Check the Flyback Transformer and Hot. especially if its a soft ticking sound

Well...as you said...the unit powers up...so you don't have a "dead set".I don't know if the speaker can be disconnected from the unit.As a rule of thumb...it is very rare that both channels (left and right )fail at the same time...it is usually one channel while the other speaker still operates.This is what I want you to do...In a quiet room..get really close to the unit...Switch it on and listen for any sound from the speakers...get really close...you should hear a slight hum from the woofers and a high frequency "hiss" from the tweeters....If no sound is heard..switch the unit off..You should hear a "plip" sound...If not...switch it on again...you should hear a slight "bump" sound from the woofers...If you hear no sound from the speakers at all..there is a problem with the output stages of the amplifier section.If you do hear sounds fron the speakers,,Turn up the volume and watch for an increase visually on the display (such as ascending numbers).If there is no indication of a volume increase...The "mute" may be stuck on..Try switching it off and on...please let me know what happens after you do all the tests....Looking to hear from you......PEACE!!!
ok...

If this clicking is a continuous clicking sound its likely that its coming from the ballast.The ballast is the component that powers the lamp.If this component fails your lamp wont ignite and wont allow the start up to continue.

Check the fuse, Sony is known for its random problems with sound. The one I have you must tap it on the side. Its a flicker switch inside.

Crackling sounds are usually electrical. Does the unit smell burnt?
If the sound is actually a ticking sound, then the heads inside the hard drive are banging and the drive needs to be replaced.
Data retrieval for drives making clicking sounds are very costly and require a data retrieval company.

dampness probably is the issue , those components on the board are delicate to moisture . open cover and look in side on the amps board for any greenish white build up of corrosion on outputs , resistors ect .

Have you replaced the lamp before? Is it a clicking sound? If you've replaced the lamp before and it is a clicking sound it's most probable to be your ballast, but if you haven't replace the lamp i recommend you change it first to see if it solves the issue, if not check teh ballast.. :)

i would suggest checking the wires on the speaker switch board, thats usually the main cause of this problem..but i dont recommend buying pioneers newer stuff

if you know what a transformer is, and if you have a multimeter, i suggest you to go ahead andcheck the transformer,