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#1
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Dead Keyboard and Mouse
My kid's PIII boots up okay but the keyboard and mouse
will not do anything. I have changed them and tried USB and PS2 versions. I've checked the power supply, keyboard fuse on the MB and everything else I can think of. My guess is the motherboard is faulty, it is a Gigabyte GA6VXC-4XP the only identifiable symptom is that a known good PS2 flashes the LEDs about once per second. Does anyone have any ideas before I replace it. I'm happy to replace the board but because of supply problems I can't get a socket 370 and will need to replace CPU and RAM too if I change board types. I can access my kid's PC across my home network but they can't use it to do anything(and are drivin' me nuts) thanks Dean |
#2
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"Dean" wrote in message
... My kid's PIII boots up okay but the keyboard and mouse will not do anything. I have changed them and tried USB and PS2 versions. I've checked the power supply, keyboard fuse on the MB and everything else I can think of. My guess is the motherboard is faulty, it is a Gigabyte GA6VXC-4XP the only identifiable symptom is that a known good PS2 flashes the LEDs about once per second. Does anyone have any ideas before I replace it. I'm happy to replace the board but because of supply problems I can't get a socket 370 and will need to replace CPU and RAM too if I change board types. I can access my kid's PC across my home network but they can't use it to do anything(and are drivin' me nuts) Does the keyboard work outside of Windows (can you press Del when you boot the machine to get into the BIOS)? Normally if there is a problem with the keyboard the PC will halt and not boot. The fact that both the keyboard and mouse have gone, and that it occurs for both PS/2 and USB would indicate to me that it's not a hardware error. It's very possible to a port somehow (bend the pins or something), but to have both PS/2 ports go and also have USB not work is too much of a coincidence. If you plug some other device into the USB port is it recognised? That would rule out USB being faulty. I have not seen this problem before. If it was just one component I would suggest you fiddle with the settings to make sure the right keyboard type etc is set. In this case though I will take the easy way out and suggest Windows is just ****ting it's pants. I would backup any data over the network then reformat and start again. Gareth |
#3
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The delete button will not allow access to the bios. The boot just continues
as normal, ignoring the pressing of the delete button. I was really surprised that the boot continues completely normally regardless of whether the keyboard and mouse are plugged in or not.. I have checked the pins and even tested all relevant voltages at the sockets. I have never encountered a fault like this before and I'm stumped. It definitely seems like a software problem but for the fact that I can't access the bios. I didn't think of trying USB devices other than the keyboard/mouse and that is a good suggestion. I have a couple of simple things which will likely give a good indication, regards Dean "Gareth Church" wrote in message ... "Dean" wrote in message ... My kid's PIII boots up okay but the keyboard and mouse will not do anything. I have changed them and tried USB and PS2 versions. I've checked the power supply, keyboard fuse on the MB and everything else I can think of. My guess is the motherboard is faulty, it is a Gigabyte GA6VXC-4XP the only identifiable symptom is that a known good PS2 flashes the LEDs about once per second. Does anyone have any ideas before I replace it. I'm happy to replace the board but because of supply problems I can't get a socket 370 and will need to replace CPU and RAM too if I change board types. I can access my kid's PC across my home network but they can't use it to do anything(and are drivin' me nuts) Does the keyboard work outside of Windows (can you press Del when you boot the machine to get into the BIOS)? Normally if there is a problem with the keyboard the PC will halt and not boot. The fact that both the keyboard and mouse have gone, and that it occurs for both PS/2 and USB would indicate to me that it's not a hardware error. It's very possible to a port somehow (bend the pins or something), but to have both PS/2 ports go and also have USB not work is too much of a coincidence. If you plug some other device into the USB port is it recognised? That would rule out USB being faulty. I have not seen this problem before. If it was just one component I would suggest you fiddle with the settings to make sure the right keyboard type etc is set. In this case though I will take the easy way out and suggest Windows is just ****ting it's pants. I would backup any data over the network then reformat and start again. Gareth |
#4
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Yeah they both work fine on my own PC. They are in the right ports and
I am beginning to think that it must be something around the keyboard fuse. The block diagram for the MB also shows one chip in common here so I think it may be fried. The really odd thing though is the failure to halt the boot process, this is something the MB has always done and now it starts fine with nothing plugged in whatsoever. Anyway school goes back Monday so I can relax for a while. regards Dean "rcm" wrote in message . ca... I would say keyboard fuse but you checked it. Does the keyboard work on another PC? Mouse also. Maybe bent pins shorting out in the keyboard or mouse. Also, real dumb suggestion!!! Do you have the keyboard in the keyboard port and the mouse in the mouse port????? Obviously if inserted backwards ...... Sometimes the simplest problem is a silly one .... "Dean" wrote in message ... My kid's PIII boots up okay but the keyboard and mouse will not do anything. I have changed them and tried USB and PS2 versions. I've checked the power supply, keyboard fuse on the MB and everything else I can think of. My guess is the motherboard is faulty, it is a Gigabyte GA6VXC-4XP the only identifiable symptom is that a known good PS2 flashes the LEDs about once per second. Does anyone have any ideas before I replace it. I'm happy to replace the board but because of supply problems I can't get a socket 370 and will need to replace CPU and RAM too if I change board types. I can access my kid's PC across my home network but they can't use it to do anything(and are drivin' me nuts) thanks Dean |
#5
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The system will boot if you "Halt on No errors" or "All but Keyboard" in the
keyboard BIOS settings. This BIOS is feature is there to allow systems to boot if they are just printer servers, firewalls, etc., that require no interaction with the user. I had a dead keyboard fuse once on a 486. I know I shorted it. I posted to this group years ago and someone told me about the keyboard fuse. On 486, it was still a visible component, green, looking like a small resistor. It had leads, ever so small. I was not skilled enough to solder on a small wire so I just took a wire from a multi-stranded wire and with patience wrapped it around the posts of each end of the fuse. It worked, system booted. It worked for years after. On later motherboards, they are stamped right on so it is impossible to bypass by a non-skilled person. Too small. I don't know why they even bother to put it on the board. Maybe to protect components like the CPU,cards, RAM, etc. Or a legacy design. "Dean" wrote in message ... Yeah they both work fine on my own PC. They are in the right ports and I am beginning to think that it must be something around the keyboard fuse. The block diagram for the MB also shows one chip in common here so I think it may be fried. The really odd thing though is the failure to halt the boot process, this is something the MB has always done and now it starts fine with nothing plugged in whatsoever. Anyway school goes back Monday so I can relax for a while. regards Dean "rcm" wrote in message . ca... I would say keyboard fuse but you checked it. Does the keyboard work on another PC? Mouse also. Maybe bent pins shorting out in the keyboard or mouse. Also, real dumb suggestion!!! Do you have the keyboard in the keyboard port and the mouse in the mouse port????? Obviously if inserted backwards ..... Sometimes the simplest problem is a silly one .... "Dean" wrote in message ... My kid's PIII boots up okay but the keyboard and mouse will not do anything. I have changed them and tried USB and PS2 versions. I've checked the power supply, keyboard fuse on the MB and everything else I can think of. My guess is the motherboard is faulty, it is a Gigabyte GA6VXC-4XP the only identifiable symptom is that a known good PS2 flashes the LEDs about once per second. Does anyone have any ideas before I replace it. I'm happy to replace the board but because of supply problems I can't get a socket 370 and will need to replace CPU and RAM too if I change board types. I can access my kid's PC across my home network but they can't use it to do anything(and are drivin' me nuts) thanks Dean |
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