Can anyone help to explain why?

Not a vacuum hose. If it is coming from the top of the motor, I would first check the oil. If there is a hole punched into the oil pan , you may be very low on oil. If oil's fine, I would suggest looking at the transmission housing. If the manhole came up and hit the housing, it may have cracked that, or cracked the fly wheel. One more thing I'm thinking is that if the manhole hit your starter, and pushed it up, It may have cracked the fly wheel. This can make it sound like it's at the top of the motor. Very loud tap tap tap tap. If you excellerate, the noise will go faster too. I just can't see a manhole doing any damage to anything in the top of motor. Make sure you check the oil ASAP. Hard to tell without hearing it. A video would even help. Let me know what you come up with. Good luck

Sounds to me like a different version of 'unintended acceleration', it is certainly a sensor somewhere, however with all those issues, i wouldn't even conjecture what the issue, i would take it to a dealer as this is a very dangerous situation.

I agree!!!!!!

You may have you phone in the silent mode. To fix this you will need to go to profiles.

hi,

Please Check and service the fans and the Air filters. then check again. In case the noise still comes then service the fans or replace accordingly. By complete service of projector, this will work.

Rave services

sounds like loose battery cables!!! that will explain th sudden no power- nothing working symptoms

Sir,
Please explain that from which you are not getting the sound??? is that from laptop or dvd system....??????
Please explain to get a solution......
will get back to you....

suddenly this error appear on my desktop ERROR 216 at 00405E5D, running my anti virus doesn't solve the problem. can anyone help me. thanks.

have you turned the sound off on the today page?

The output section has a problem and the amp is in "protect" mode. This will most likely require the replacing of the output transistors and a few other parts. Figure about $20 in parts plus your local labor charge.
Dan