PS/2 & USB port failure

  • Thread starter Thread starter Peter Ives
  • Start date Start date
P

Peter Ives

It appears my shuttle MK35VN midi mobo has gone wrong, though I just
want to check if there's anything else I can try.

I bought it just 2 weeks ago and all was well, except that I couldn't
attach the front USB ports from my original case onto the USB3 outlet on
the board because the IDC connector wasn't quite right. It had 5 holes
on one side and 4 on the other, whereas on the board the pins were on
the opposite sides. So I went and bought a 10 hole IDC, attached the
ribbon cable and plugged onto the USB3 outlet. I then started up and
WinME booted just fine, so I thought, so I attached a USB device to the
front panel, but no response. It was only then that I discovered that
neither the PS/2 mouse or USB keyboard were working and so I had to
physically turn off the machine.

Anyway, to cut a long story short, I've also tried a PS2 keyboard with
no success, even at boot when it asks me to press DEL to enter setup.
As a last resort I decided to reset the CMOS and now it comes up with
CMOS checksum error - defaults loaded. Press DEL to enter setup F1 to
continue, which of course I cannot do either with no response from the
keyboard.

I've disconnected everything except, cpu, memory, floppy, HD and G/FX
card, but no joy. I would expect lights to flash on keyboard at boot
but nothing so there appears to be no power now going to either PS/2 or
USB.

So, is it possible that the connection of the front panel USB caused
some kind of damage to the motherboard? It seems strange that it could,
as I'm sure if connected those things up wrong before and just swapped
them round if they didn't work.

I've checked on google/groups on this but keep getting all the wrong
hits. Will keep trying though.

Thanks in advance.
 
It appears my shuttle MK35VN midi mobo has gone wrong, though I just
want to check if there's anything else I can try.

I bought it just 2 weeks ago and all was well, except that I couldn't
attach the front USB ports from my original case onto the USB3 outlet on
the board because the IDC connector wasn't quite right. It had 5 holes
on one side and 4 on the other, whereas on the board the pins were on
the opposite sides. So I went and bought a 10 hole IDC, attached the
ribbon cable and plugged onto the USB3 outlet. I then started up and
WinME booted just fine, so I thought, so I attached a USB device to the
front panel, but no response. It was only then that I discovered that
neither the PS/2 mouse or USB keyboard were working and so I had to
physically turn off the machine.

Anyway, to cut a long story short, I've also tried a PS2 keyboard with
no success, even at boot when it asks me to press DEL to enter setup.
As a last resort I decided to reset the CMOS and now it comes up with
CMOS checksum error - defaults loaded. Press DEL to enter setup F1 to
continue, which of course I cannot do either with no response from the
keyboard.

I've disconnected everything except, cpu, memory, floppy, HD and G/FX
card, but no joy. I would expect lights to flash on keyboard at boot
but nothing so there appears to be no power now going to either PS/2 or
USB.

So, is it possible that the connection of the front panel USB caused
some kind of damage to the motherboard? It seems strange that it could,
as I'm sure if connected those things up wrong before and just swapped
them round if they didn't work.

I've checked on google/groups on this but keep getting all the wrong
hits. Will keep trying though.

Thanks in advance.
Click to expand...

It is likely that both USB and your PS/2 ports share a common 5 volt
line that is protected by a "micro" fuse. Connecting up the front
panel USB wrong probably blew that fuse. No 5 volts, no functions

JT
 
<lost of info snipped with regard to 5volts fuse blown>

Cheers to the 2 Jims for that. I have been able to change the mobo
which means I can try again. However, I'm loath to just use that ribbon
cable with an IDC attached. For now those 2 frontside USB ports are
going to have to stay unused until I can figure out which line relates
to what. My best option as I see it is to get hold of the mobo manual
for the old motherboard that was in the case. This should hopefully
give the original pin outs and what they were for. Problem was it came
out of a compaq computer and they didn't include a mobo manual so I need
to do some digging.

Obviously I didn't buy a compaq. I wouldn't dare come on
alt.comp.hware.pc-homebuilt and say that. It was my GFs. :)
 
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