hard_nox Posted January 15, 2009 Report Share Posted January 15, 2009 Ok, a few months ago my home was hit by lighting. My computer which was not on a surge suppresor (i know stupid) got hit, along with a few other low voltage items. My computer still accesses the net, but all of the usb ports (both in the front and rear of the machine) and sd card reader are dead. Any ideas? Is this worth fixing? Money as usual is always tight. I have already tried using a usb hub so i can get my new printer up and running (the old one died after the lighting hit). I thought I could plug the usb hub where the keyboard plugs in and then feed my other accessories off the remianing hub areas. This did not work. The keyboard would not function wired this way. Any ideas? Computer seems to work fine still burn cd and dvd, and can connect to net, no loss of speed, just lost all power to usb ports, and mmc/sd slot. Quote Link to comment Share on other sites More sharing options...
EricM9104 Posted January 15, 2009 Report Share Posted January 15, 2009 gonna have to replace the motherboard. WHat's the make and model of the computer? Quote 2015 Honda Civic LX 4dr | 24k miles Stock H/U and mids/highs Power Acoustik GW3-12" D2 Sub HiFonics BXX1200.1D @ 1ohm Random 2.5^3' dual ported box NVX LOC Stinger wiring throughout 1977 Chevy SWB Cammed 350 Dual exhaust Cheap Wish stereo Link to comment Share on other sites More sharing options...
pimpedout97x Posted January 15, 2009 Report Share Posted January 15, 2009 yea, most likely your mother board is done Quote Link to comment Share on other sites More sharing options...
whysoserious? Posted January 15, 2009 Report Share Posted January 15, 2009 ICH5/ICH5R has a problem, where latchup damages part of the chip. The results are, Device Manager shows the USB ports, all in order and correct, but each USB port is "deaf". And the reason for it, is the power source feeding the I/O driver, burns out, leaving the physical layer of the USB port non-functional. +5V -----/ /--+ <--- broken power path | v +5V Physical Logic Block ------------ I/O driver --------- D+ Layer Works OK --------- D- Of GND Port When the lightning strikes, it can induce a transient on the physical layer, and damage it. So it is possible the port may have failed, because of damage to the +5V,D+,D-,GND spot. It is even possible the +5V path to the port is what failed, and you might want to check that a mouse lights up when plugged into the port. The port won't function, if the +5V on the connector is no longer working. Some of those are fuse protected (but the fuse is a Polyfuse type, which normally never needs replacement, and the fuse recovers after it cools off). If you purchased the exact same motherboard, you should be able to drop it into place and continue using it. Depending on what other devices are damaged in your computer. If the lightning strike is very close, the effect can be powerful enough to leave physical effects, like burn marks, charring, chips with lids blown off. But even a weaker strike, can still leave invisible effects. Another thought that occurs to me, is you could purchase a USB2 PCI card, and use that to get some USB ports. That won't necessarily help with editing the contents of the BIOS using a USB keyboard, but for other USB purposes, it would give you some working ports, without replacing the motherboard. Quote Link to comment Share on other sites More sharing options...
hard_nox Posted January 15, 2009 Author Report Share Posted January 15, 2009 gonna have to replace the motherboard.WHat's the make and model of the computer? It is a HP mx705. Quote Link to comment Share on other sites More sharing options...
hard_nox Posted January 15, 2009 Author Report Share Posted January 15, 2009 ICH5/ICH5R has a problem, where latchup damages part of the chip.The results are, Device Manager shows the USB ports, all in order and correct, but each USB port is "deaf". And the reason for it, is the power source feeding the I/O driver, burns out, leaving the physical layer of the USB port non-functional. +5V -----/ /--+ <--- broken power path | v +5V Physical Logic Block ------------ I/O driver --------- D+ Layer Works OK --------- D- Of GND Port When the lightning strikes, it can induce a transient on the physical layer, and damage it. So it is possible the port may have failed, because of damage to the +5V,D+,D-,GND spot. It is even possible the +5V path to the port is what failed, and you might want to check that a mouse lights up when plugged into the port. The port won't function, if the +5V on the connector is no longer working. Some of those are fuse protected (but the fuse is a Polyfuse type, which normally never needs replacement, and the fuse recovers after it cools off). If you purchased the exact same motherboard, you should be able to drop it into place and continue using it. Depending on what other devices are damaged in your computer. If the lightning strike is very close, the effect can be powerful enough to leave physical effects, like burn marks, charring, chips with lids blown off. But even a weaker strike, can still leave invisible effects. Another thought that occurs to me, is you could purchase a USB2 PCI card, and use that to get some USB ports. That won't necessarily help with editing the contents of the BIOS using a USB keyboard, but for other USB purposes, it would give you some working ports, without replacing the motherboard. The low voltage side of my furnace took a nasty hit and a large section of the circuit board was black and brittle. I have opened the computer but did not see any black or burned places. I did have a large section of my tree and ground where is looks like someone placed a landmine...LOL. Quote Link to comment Share on other sites More sharing options...
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