P/I-P55T2P4: Mouse not working on PS/2 or serial port

Hi All

I have an old PC with an Asus P/I-P55T2P4 motherboard, I have Windows
98 SE installed. This PC was working well, but one day the PS/2 mouse
was not working anymore. The BIOS is version 2.07, the latest I found.

I did the following tests on this computer:

I checked the voltages on the power supply - motherboard connector,
they are fine.

I booted with a DOS disk and loaded the mouse driver, but it didn't
find the mouse.

I plugged a new mouse from another PC, but it was also not working.

I removed the PS/2 mouse and tested a serial mouse on COM1, then on
COM2, in both cases the mouse was not working.

I thought maybe there is a problem with the I/O controller chip and I
installed a serial port card, disabled the on-board serial ports, then
tested the serial mouse on this serial port, the mouse was not
working.

I repeated the test with the PS/2 optical mouse from my newest PC,
there I noticed that the LED never goes on. On my new PC, the LED is
on as soon as I switch on the PC.


Can someone explain me what could be wrong with this PC? What can I do
with this PC to have the mouse working again?
I know, it's an old PC, but it's fast enough for what I use(d) it.



Thanks in advance for your help

Michel

Hi Paul,

Thanks for the information. I will check the motherboard tomorrow for
blown fuses, the PC is now at my parent's house.

I'm sorry for the multiple posts. I didn't get a response when I
posted them, I got always a time out and I repeated to post it again.
Just before I see, that they posted successfully.


Michel

On Sat, 21 May 2005 14:46:59 -0400, (Paul) wrote:

In article 1116692192.7b1534dd8e0c8d94a5f7f22042367645@teran ews, Michel
Kuhn wrote:

Hi All

I have an old PC with an Asus P/I-P55T2P4 motherboard, I have Windows
98 SE installed. This PC was working well, but one day the PS/2 mouse
was not working anymore. The BIOS is version 2.07, the latest I found.

I did the following tests on this computer:

I checked the voltages on the power supply - motherboard connector,
they are fine.

I booted with a DOS disk and loaded the mouse driver, but it didn't
find the mouse.

I plugged a new mouse from another PC, but it was also not working.

I removed the PS/2 mouse and tested a serial mouse on COM1, then on
COM2, in both cases the mouse was not working.

I thought maybe there is a problem with the I/O controller chip and I
installed a serial port card, disabled the on-board serial ports, then
tested the serial mouse on this serial port, the mouse was not
working.

I repeated the test with the PS/2 optical mouse from my newest PC,
there I noticed that the LED never goes on. On my new PC, the LED is
on as soon as I switch on the PC.


Can someone explain me what could be wrong with this PC? What can I do
with this PC to have the mouse working again?
I know, it's an old PC, but it's fast enough for what I use(d) it.



Thanks in advance for your help

Michel

Based on the description in this posting, it sounds like there is
a conventional fuse in the power path to the connector. None of
the pictures available, of that motherboard, are clear enough for
me to verify the info:

http://groups.google.ca/group/alt.co...d5c78a5 f2e29

"Yes there is - having fried a number with a mal wired PS/2 mouse
connector !

Top Left Corner - just North of the KB connector & just South
of the mounting hole. *On *my 3.1 it even sez '125V 3A'.

You can unsolder it & replace or - if you are lazy - solder a new
one onto the leads of the old one. *(I'm typing thru that technique
as we speak !)"

HTH,
Paul

Paul wrote:
I have an old PC with an Asus P/I-P55T2P4 motherboard, I have Windows
98 SE installed. This PC was working well, but one day the PS/2 mouse
was not working anymore. The BIOS is version 2.07, the latest I found.

I did the following tests on this computer:

I checked the voltages on the power supply - motherboard connector,
they are fine.

I booted with a DOS disk and loaded the mouse driver, but it didn't
find the mouse.

I plugged a new mouse from another PC, but it was also not working.

I removed the PS/2 mouse and tested a serial mouse on COM1, then on
COM2, in both cases the mouse was not working.


Based on the description in this posting, it sounds like there is
a conventional fuse in the power path to the connector. None of
the pictures available, of that motherboard, are clear enough for
me to verify the info:

http://groups.google.ca/group/alt.co...d5c78a5 f2e29

"Yes there is - having fried a number with a mal wired PS/2 mouse
connector !

Top Left Corner - just North of the KB connector & just South
of the mounting hole. On my 3.1 it even sez '125V 3A'.

You can unsolder it & replace or - if you are lazy - solder a new
one onto the leads of the old one. (I'm typing thru that technique
as we speak !)"
However, if this fuse is blown, the (ps2) keyboard won't work neither,
typically resulting in not booting at all (unless you've switched off
the "halt on errors" in the bios). The fuse on this board can easily be
blown when hot-plugging the mouse into the ps2 port IME (and if you
short-circuit when you add that ps/2 port, but that's another story...).

Roland

Hello,

- Check the Bios settings.
- Check with another operating system.
Serial mouse should always work.


P55t2p4 V.3.1
K6-2 500Mhz working at 415Mktz
256 Mo Memory
(Looking for a K6-3)

On Sun, 22 May 2005 00:34:09 +0200, Roland Scheidegger
wrote:

Paul wrote:
I have an old PC with an Asus P/I-P55T2P4 motherboard, I have Windows
98 SE installed. This PC was working well, but one day the PS/2 mouse
was not working anymore. The BIOS is version 2.07, the latest I found.

I did the following tests on this computer:

I checked the voltages on the power supply - motherboard connector,
they are fine.

I booted with a DOS disk and loaded the mouse driver, but it didn't
find the mouse.

I plugged a new mouse from another PC, but it was also not working.

I removed the PS/2 mouse and tested a serial mouse on COM1, then on
COM2, in both cases the mouse was not working.


Based on the description in this posting, it sounds like there is
a conventional fuse in the power path to the connector. None of
the pictures available, of that motherboard, are clear enough for
me to verify the info:

http://groups.google.ca/group/alt.co...d5c78a5 f2e29

"Yes there is - having fried a number with a mal wired PS/2 mouse
connector !

Top Left Corner - just North of the KB connector & just South
of the mounting hole. On my 3.1 it even sez '125V 3A'.

You can unsolder it & replace or - if you are lazy - solder a new
one onto the leads of the old one. (I'm typing thru that technique
as we speak !)"
However, if this fuse is blown, the (ps2) keyboard won't work neither,
typically resulting in not booting at all (unless you've switched off
the "halt on errors" in the bios). The fuse on this board can easily be
blown when hot-plugging the mouse into the ps2 port IME (and if you
short-circuit when you add that ps/2 port, but that's another story...).

Roland

Thanks for your answer.

I checked the fuse, it's still OK.

Well, after several tests I noticed that my serial mouse I used for
the tests is broken. The second mouse with a PS/2 - serial adapter is
broken. The PS/2 mouse port on the PC is also broken. The other three
mices that I used for the tests are probably PS/2 only, not serial and
PS/2 combo.
Finally I found a very old serial mouse which is now working :-)


Michel