Question about HP PAVILION DV4000 AND V4000 SERIES (FF)MOTHERBOARD - 403895-001 CD-ROM Drive

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HP Pavilion DV400, USB ports not working after a pw failure

I'm used to have an HP Pavilion DV4000 connected to the telephone line via an external modem using the USB adapter. After a big tunderstorm a power failure occured, the external modem burned and all the USB adapters stopped to work.
What could have happened to the computer?
Is there any protection for the USB?
How can I solve the problem?

Thanks

Leo

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You can get surge protection for your phone line I have one that is part of my broadband filter from homebase its a bit late now but worth buying to stop this happening again.

The phone line gives you a nominal 50V but when a power spike occurs this can be passed onto the PC through the phone 2000 socket that the router or modem is connected to and then can fry components with upto 500V spikes for only a few milliseconds, it is worth putting surge protection on all your electrical appliances to prevent this happening.

N.B> a plug with a fuse is not enough protection this just gives you over current and is used to protect the supply from a faulty appliance a surge is voltage which is something else. So I suggest that you connect youe entire PC to a Belkin Power Surge supply or battery backup to prevent these random surges from affecting the PC as well.

Since the USB is only 5V that is given to the device to enable it to work and will only normally blow if you connect it to a 1394 mobo socket, you could try passing the USB to the PC via a hub in the hope this may give you some protectionm but I doubt it.

Posted on Oct 09, 2009

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This gives you an idea of what is involved,

http://www.insidemylaptop.com/disassemble-hp-pavilion-dv6500-dv6600-dv6700-dv6800-notebooks/

[Older HP Pavilion DV6500 through DV6800 models]

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http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

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