Thread View: alt.comp.hardware
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Started by Johnny Solar
Tue, 02 Mar 2004 14:25
Unexpected reboot problem - Possible sollution -
Author: Johnny Solar
Date: Tue, 02 Mar 2004 14:25
Date: Tue, 02 Mar 2004 14:25
84 lines
4635 bytes
4635 bytes
> Hi > > Sorry for crossposting this, but I feel that this information has a better > chance of reaching the people in need, when they use the various search > engines to find an answer to a quite common, but so far, very mysterious > problem. > > The problem im talking about is computers that for no apparent reason reboot > (no not because of viruses or worms). > In windows, typically you would only see an entry in the system log like > this; > > Previous shutdown was unexpected > > > There are no other log entries, no bluescreens, no memorydumps, just this > entry. > When tracking the problem, people tend to find nothing wrong with their > hardware, memory, powersupply or with their OS. > There have been discussions about this subject, touching things like memory > problems, powersupply problems and so on. > > A very possible explanation: > > It may be that your motherboard has the types of capacitors/condensers that > fails after a while, we've had two different brands of motherboards with the > same problem on them, one VIA chipset mb and one MSI motherboard; > > Typically the computer started to reboot without warning at random times > after about 2.5 years of troublefree service. > It was nothing in the windows 2000 log except "Last shutdown at xx:xx:xx was > unexpected" > After testing the computers to the best of my knowledge i finally contacted > IBM support who then changed the motherboard on my computer, no questions > asked. > > The sollution to the mystery: > > You can see it easily by opening up your computer and check for the > components that look like small barrels around your processor (can be placed > elsewhere too though), these "barrels" are called capacitor or condensers. > These capacitors/condensers are supposed to be flat ontop (usually they have > a cross marking too), if they bulge upwards ontop (like a cone, tuch it with > your finger and feel it), it means they have failed, and your processor is > no longer getting a stable voltage/current, causing it to reboot at random > times, just like if you had overclocked it too much. The aim of the > condensators as it was explained to me by the serviceman from IBM, was to > keep the voltage at a stabile level towards the cpu, as it can fluctuate > during uptime. > > If this is the case, contact your dealer and get a refund or similar, > becuase it's not a user error, but a vendor error. > The capacitor/condenser type was faulty produced and they are common across > a wide range of motherboards, so it can happen to IBM, Compaq, Dell and the > whole lot out there. > > This problem was most common in motherboards produced around 1999-2002 i > think, but offcourse this may happen on some various brands today for all i > know. > > > Anyway, I just wanted to contribute to a sollution to a very annoying > problem for those it conserns, it's almost impossible to know/see it if you > aren't an expert, but now you know. > > > Best regards > Johnny Solar > >
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