Why is my sound fading in and out?

SOURCE: Toshiba SD-2050 problem reading discs

If it reads only the first track, it sounds like a mechanical obstruction of the laser assembly (something is physically blocking it from travelling on its rails). If you are so inclined, try removing the deck lid andgently pushing the laser (in an area where there's nothing fragile) along its track to see if it frees up. It doesn't usually take much.

SOURCE: Toshiba DVD SD-3980SU2 or SC2 player loads every disc as "bad disc"

Toshiba says:
Information for Owners of Toshiba SD-3980 and SD-K750 DVD Players To ensure the satisfaction of our customers and to maintain the integrity and quality of our products, Toshiba America Consumer Products, L.L.C. is issuing an important product update. This is not a safety issue.
Toshiba is committed to customer service and to continuously improving the quality of its products. It has come to our attention that certain DVD players bearing the model numbers SD-3980 and SD-K750 may at some point in their life stop playing discs due to a component part failure. In such case, the error message "bad" will be shown on the unit's display. Affected units will have "SU2" at the end of the model name (e.g., SD-3980-SU2), which can be found on the back of the unit.
If you own either of these models and experience the issue described above, please contact Toshiba Customer Solutions at 1-800-631-3811 for information on how to obtain a replacement unit.

SOURCE: how to reset the default value for the toshiba sd 6100 dvd player

If you want HDMI 'Auto' mode (the factory default), you need a combination of selecting the proper output mode (use the remote's 'Progressive' button to toggle between the four output modes: HDMI, RCA VGA, component video out and s-video. Once you're in HDMI mode (the led's on the front of the box are a dead give-away!), then you can press the front panel 'HDMI Select' button to move through the five available HDMI settings: 480P, 720P, 1080i, 1080P and 'Auto'. You're in 'Auto' mode when all four led's are lit.

SOURCE: Reset Toshiba SD-5000 Dvd player to factory defaults

With most Toshibas, you could un-plug them and leave it for either 10minutes or 30minutes and it would reset. strange, I know. give it a try.

I also found this when working on a similar problem with your player, it may be relevant -you could try pressing the power button and another button..
sorry, I don't have one in front of me to test..

[[power off the player
hit the power button and immediately hold the HDMI select button
the 3 HD indicator lights will cycle and then pushing the HDMI select button will move through the resolutions.]]

SOURCE: Samsung Model HLR4667WAX/XAA is making a buzzing sound

This TV is horrible. I have the same one and not even a year replaced the light bulb twice. Very disappointing for a Samsung.