HELP NEEDED PLEASE .........PC switchin off all the while

16 replies
Found 1st Sep 2008
alright , old heatsink an fan kept getting clogged up with dust, pc then started to overheat and switch off . had to switch off at the back of the tower as the front had a green light but would not start up . immediately afterward switching on ....it would say , Failed CPU test .....or something like it .

got a new heatsink and fan .....also upgraded

from
256 mb ram to 1gb stick ........


since then its sometimes switching off for no apparent reason .....no overheat fail when restarting but dont know whats going on .....thinkin maybe its to do with the PSU not having enough power to keep everything ok ......

advice really neede please ........thanks

16 Comments

Original Poster

also to let u know I have prev hoovered out the pc numerous times and yesterday i took the psu out and blew dust out of it , hoovered out the fan and the heatsink and its still doing it , internet also seems slower :thinking:

Original Poster

bump.................................

sounds malware ish, done the scans with spybot etc?,
When you replaced the cpu heatsink you did clean the CPU so no old paste was left on?

Original Poster

maddogb;2872414

sounds malware ish, done the scans with spybot etc?, When you replaced … sounds malware ish, done the scans with spybot etc?, When you replaced the cpu heatsink you did clean the CPU so no old paste was left on?



no , the guy in the shop just took the old one off an replaced it

not done any scans , have avg installed though

alnbowes;2872433

no , the guy in the shop just took the old one off an replaced itnot done … no , the guy in the shop just took the old one off an replaced itnot done any scans , have avg installed though



very bad move, and very unprofessional, switch it off, go buy some thermal paste and redo the fitting, if you are very lucky it hasn't knacked the cpu but doesn't sound like it
Download spybot from [url]www.spybot.info[/url], install, update, immunise and scan. assuming you can

What CPU is it? Pentium 4 and later and Athlon 64s and later have thermal protection diode which *should* protect them in case of fan/heatsink/compound failure, earlier CPU's often do not and can be permanently damaged very easily (and quickly) by failing CPU fans or poor thermal interface.

If you enter the BIOS menu there is usually a page which tells you the output voltages from the PSU and CPU fan speed/processor temperature - if it says (eg) the '12V' rail is well below 12V the PSU may well be the culprit.

Also - have you cleaned the other fans/heatsinks (such as on the northbridge on the motherboard) - its not really advisable to use a hoover though, a can of compressed air is a much better idea...

As has been said above it may be that the heatsink replacement was done properly with cleaning and re-applying thermal compound, it also points to malware, what has not been mentioned though that the RAM may not be seated correctly? Is it the only stick in the system? If so its unlikely to be that but if there are other sticks alongside it then it may be that, also if the system is oldish it may not be able to handle 1 gig of ram.

Original Poster

jah128;2872534

What CPU is it? Pentium 4 and later and Athlon 64s and later have thermal … What CPU is it? Pentium 4 and later and Athlon 64s and later have thermal protection diode which *should* protect them in case of fan/heatsink/compound failure, earlier CPU's often do not and can be permanently damaged very easily (and quickly) by failing CPU fans or poor thermal interface.If you enter the BIOS menu there is usually a page which tells you the output voltages from the PSU and CPU fan speed/processor temperature - if it says (eg) the '12V' rail is well below 12V the PSU may well be the culprit.Also - have you cleaned the other fans/heatsinks (such as on the northbridge on the motherboard) - its not really advisable to use a hoover though, a can of compressed air is a much better idea...



paintbrush???? thats what the guy said

Original Poster

harlzter;2872576

As has been said above it may be that the heatsink replacement was done … As has been said above it may be that the heatsink replacement was done properly with cleaning and re-applying thermal compound, it also points to malware, what has not been mentioned though that the RAM may not be seated correctly? Is it the only stick in the system? If so its unlikely to be that but if there are other sticks alongside it then it may be that, also if the system is oldish it may not be able to handle 1 gig of ram.



asus 7x 8 v or summat

Original Poster

harlzter;2872576

As has been said above it may be that the heatsink replacement was done … As has been said above it may be that the heatsink replacement was done properly with cleaning and re-applying thermal compound, it also points to malware, what has not been mentioned though that the RAM may not be seated correctly? Is it the only stick in the system? If so its unlikely to be that but if there are other sticks alongside it then it may be that, also if the system is oldish it may not be able to handle 1 gig of ram.



aye but it was working fine until a few days ago , started seeming to struggle then

Original Poster

jah128;2872534

What CPU is it? Pentium 4 and later and Athlon 64s and later have thermal … What CPU is it? Pentium 4 and later and Athlon 64s and later have thermal protection diode which *should* protect them in case of fan/heatsink/compound failure, earlier CPU's often do not and can be permanently damaged very easily (and quickly) by failing CPU fans or poor thermal interface.If you enter the BIOS menu there is usually a page which tells you the output voltages from the PSU and CPU fan speed/processor temperature - if it says (eg) the '12V' rail is well below 12V the PSU may well be the culprit.Also - have you cleaned the other fans/heatsinks (such as on the northbridge on the motherboard) - its not really advisable to use a hoover though, a can of compressed air is a much better idea...



amd 2000 i think , it runs about 1600 mghz about , i think

Original Poster

been on for a good 20 mins at the mo

Get yourself in the bios menu, find where it says what temperature the CPU is at and report back to us...

(If its over say 50 degrees when its just been switched on and isn't doing much then that is probably your problem - need to remove heatsink, clean CPU and heatsink, reapply a good thermal paste and reseat.)

Original Poster

jah128;2872634

Get yourself in the bios menu, find where it says what temperature the … Get yourself in the bios menu, find where it says what temperature the CPU is at and report back to us...(If its over say 50 degrees when its just been switched on and isn't doing much then that is probably your problem - need to remove heatsink, clean CPU and heatsink, reapply a good thermal paste and reseat.)



cheers for the help , do i turn off an leave 4 a bit or do i turn off an straight back on :thumbsup:

Would probably be best doing it straight away so you get an idea of what its at when the computers been running a while - but the CPU rises and falls in temperature very quickly so shouldn't make that much difference!

Grab a Linux LiveCD, and try using that for a little while. See if your PC is still slow , if it is chances are Windows virus.

CHeck network activity, if the modem lights are flashing too much and no-one it using internet might be some dodgy virus/malware.
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