My computer shutdown itself !!!!

  • Thread starter Thread starter Victor Acuña
  • Start date Start date
V

Victor Acuña

Hi!, Guys:
My computer itself do a shutdown without any warning notice since a some time (and it seems like
each time does it faster).
I opened its case and visually check everything and I have failed to see nothing rare.
I found this, when you are working in the BIOS Setup's screen or in DOS with a diskette, it does not
go off .
It has damaged my WinXP and I need to recover the registry files (I can't do it yet, because the
random powerdown).
Then I put another disk that I have, and installed a Win98 in it, all O.K., I was able to install
it, but when I began to utilize it, the machine turn off itself again.
This happen in a short time, when I try to do any operation (open files, see disks, etc.)
And now when I start the Win98, as soon as I want to do something, it shut off.
I short-circuited the power-on supply's cable so that when the problem happens the supply not go
off, although the motherboard does it and let everything in black.
The health screen in the setup show normal values in voltages and the temperature of the CPU (a
Celeron 1.8GHz) does not touch the 50 ºC.
The machine has a main board Shuttle AB45 with chips i845 and 128 DDR RAM.
As I am at work in isolating the problem, what I want to know is if somebody can give me any idea to
know what can be happening or for where go trying .
Sincerely,
Victor
PS: And please, apologize my English
 
I would try another power supply.

--

Jerry G.
======


Hi!, Guys:
My computer itself do a shutdown without any warning notice since a some
time (and it seems like
each time does it faster).
I opened its case and visually check everything and I have failed to see
nothing rare.
I found this, when you are working in the BIOS Setup's screen or in DOS with
a diskette, it does not
go off .
It has damaged my WinXP and I need to recover the registry files (I can't do
it yet, because the
random powerdown).
Then I put another disk that I have, and installed a Win98 in it, all O.K.,
I was able to install
it, but when I began to utilize it, the machine turn off itself again.
This happen in a short time, when I try to do any operation (open files, see
disks, etc.)
And now when I start the Win98, as soon as I want to do something, it shut
off.
I short-circuited the power-on supply's cable so that when the problem
happens the supply not go
off, although the motherboard does it and let everything in black.
The health screen in the setup show normal values in voltages and the
temperature of the CPU (a
Celeron 1.8GHz) does not touch the 50 ºC.
The machine has a main board Shuttle AB45 with chips i845 and 128 DDR RAM.
As I am at work in isolating the problem, what I want to know is if somebody
can give me any idea to
know what can be happening or for where go trying .
Sincerely,
Victor
PS: And please, apologize my English
 
Using the information provided, no one can tell you what is
wrong. However, that information tells us where to next get
facts. Unfortunately you tried to fix things (ie. install the
so grossly unreliable Windows 98) and have therefore destroyed
valuable facts. Never just wildly fix something only on
speculation. Fix something because we know that is the
problem. If we don't know what is wrong, then we keep
collecting facts.

How to get more important information. First, facts that
could have provided details in Windows XP. What does the
system (event) log report? This log has details - with
numbers because numbers are always necessary - on previous
events. Including events that could have been warning you of
impending failure before that failure happened. Also what did
Device Manager report?

All responsible computer manufacturers provide comprehensive
hardware diagnostics, for free, on their web site and
sometimes on the hard disk. This is hardware testing without
the complication of Windows. Notice, again, the principle.
First we break a problem down into component parts. Then we
verify integrity of those component parts. If your computer
manufacturer is an irresponsible type, then you must download
individual diagnostics from each component manufacturer.

Of course, we always start with an analysis of the
foundation. One never fixes anything in a house without first
verifying the integrity of that foundation. In a computer,
the foundation is a power supply 'system'. A 'system' is not
just a power supply. The other tool as essential as the
screwdriver is a 3.5 digit multimeter. Your eyes are mostly
useless without that meter. Your eyes cannot see electrons.
Solution always starts with numbers. Some of the important
voltage levels will be on signals called Power Good and Power
On. What do those signal do just as power is turned on AND
after power has been applied? Essential information if you
want useful responses here from the better informed lurkers.

Procedure to get those essential numbers as well as an
introduction as to how that power supply 'system' works:
"Computer doesnt start at all" in alt.comp.hardware on 10
Jan 2004 at
http://tinyurl.com/2t69q
"I think my power supply is dead" in alt.comp.hardware on 5
Feb 2004 at
http://www.tinyurl.com/2musa

OK. You don't know what those numbers mean?. No problem.
You have just provided facts necessary for a reply that does
not wildly speculate. Any post that says replace the power
supply is only wild speculation.
 
w_tom:
I have a BEET degree and I used a Tektronics 100Mhz scope and Fluke 4.5
digit multimeter to analize it.
I think that I have some background in digital electronics.
I tried to isolate the problem and I found that the problem is in the
IT8712F IC.
Now I sent it to a computer repair shop near my home (sure they have the
tools, parts and experience) to change it.
Thanks for all.
Sincerely,
Victor
 
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