Speakers buzz with no sound

if it sounds fine in the head phones and not though the speakers - unit has a faulty pa stage

This type of sound can be generated by the back-light inverter board.

You don't say what a 1055 is and it is hard to know what you are asking with a lack of ID on the equipment at fault. Sounds like a source selection problem maybe a switch or if electronics a CD4066 IC.

It looks like you've either blown the speakers of the amplifier itself. What were you doing when you got the pop and the sound stopped? (Playing CD or from External Source and at what volume level?)

If there is no sound at all from the speakers, not even a crackle or buzz then it's more than likely you've blown the amplifier.

You could narrow the fault by trying these speakers on another unit or another set of speakers on this unit.

If you require further assistance then please ask.

Need a new av cable

Mine is loud also when playing games. When playing DVD's it is not. I think it is a factory defect on some of the systems. I would not attempt to pull apart the DVD drive and try and fix it. It is working and on an XBOX 360 you should feel lucky that it is.

Sounds like feedback. Check your speaker connections at the speaker and the main unit.

Is it a copied disk? this only happens to those types of disk. Try contacting Microsoft.

switch your subwoofer off from the socket for at least 30 minutes and check if the noise is still there,if its still there open it and play a movie then press it lower if the sound stops then you will have to put some toilet papers at the back of it ,thats what I did to mine.

How many years have you had this laptop? Sad to say, if it's many years, time to replace as that would be cheaper.