I have a laptop sony vayo . it was working fine till started to make a shrieking noise . i turn it off ( from the start button -the only way it worked ) and then tried to turn it on . the screen remain black and the noise was the same

Is the tv signal originated from cable tv box? Or a antenna?

You can look for it on eBay.com. Usually there is a seller who sell one key for low price.

Hi There,
During bootup of your laptop, press the F10 key. This will bring up the restoration menu and allow you to restore your laptop to factory condition.

You can download the WEBcam abd device drivers from the Sony WEB site.
Select your model notebook and the Windows drivers you require. Pleaseclick on this link to the Sony support WEB site :-
http://esupport.sony.com/US/perl/select-system.pl?PRODTYPE=1,24,72&DIRECTOR=DRIVER

There is no back up sensor its sound like a belt noise, and it probalbe will make the noise foward also.

http://www.kb.sony.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=C1015608&sliceId=2&docTypeID=DT_KNOWLEDGEARTICLES_1_1&dialogID=218694937&stateId=1%200%20218710483

I would stop using the adapter immediately. It could be about to blow. When one of these blows, you can get smoke, sparks and fire. You don't want that to happen when you are not around. Further you don't want to have a voltage spike from the adapter to *********** board. You can buy a new adapter at Walmart or whereever. Just be sure that it supports Dell computers. Dell uses a third pin frequently. Check the voltage and amperage of your current adapter. You should see something like 19V and 3 Amps. Make sure that your replacement adapter works within those rages.

You can also buy an exact match from Dell or ebay.

Expect a good Universal adapter that you buy at Walmart to be in the range of 50-100.

The good thing about a universal adapter is that you can use it on another notebook later.

This sounds like your motor's out.

No, do not spray oil on your belts. Have the belt replaced if that's where the noise is coming from. The squeaky belt could also indicate one of the accessories may be bad. Have who ever replacing the belt check to make sure all the accessory pulleys turn freely.

check for broken rca input GND.