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I removed the processor in my P4 desktop PC and when I replaced the processor the PC would not power up. Have I accidentally unplugged a cable or is there a chance that I've zapped the processor with static?

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  • JimK100 Nov 24, 2008

    Many thanks for your response. First of all my PC is a P4 1.7Ghz on an Intel D850MV motherboard. I was intending to upgrade my processor to 2.6Ghz (the fastest that the MB will support) and simply wanted to get the data printed on the CPU and also to accquaint myself with what I would have to do when I got the faster processor. (I know, I should have used software to get the becessary info.) I stupidly also forgot to ground myself to prevent the static problem. So much for acting before thinking!!!

    Having removed theCPU, wiped the old thermal grease off both the face of the CPU and the heatsink and replaced the CPU - not using any thermal grease - the PC simply would not fire up at all. I have checked that power is getting to the MB - there is only a small green LED showing on the MB. There was never any sparking, or evidence of other power short circuiting at all. I have also removed the power cable (and the back-up battery) and left it for 20 mins. before trying again. Still no joy. I'm afraid this is as much info. as I can give at the moment.

    Many thanks for any advice given.

  • JimK100 Nov 24, 2008

    Thanks Tekkididi.

    I appreciate the time you've spent on this. First of all, as I said earlier, there is absolutely nothing at all making either a sound or lighting up (other than the small green LED on the MB.) I'm assuming that it can't be the power lead as the power is getting to the mb (or else the LED wouldn't light up).

    But I checked the lead anyway. There has also never been any sparking, smoke, smells (burning or otherwise). As I said, I originally thought that I'd accidentally pulled off a power lead in the main body of the case. But now that I've checked this all out, it seems that the cpu is the problem.

    I was really surprised when nothing at all would fire up as I'd assumed that the power supply and its fan, along with the hard drives etc., would all start up.

    I know now that the cpu controls all, so it's looking as if it's definitely the cpu that's been zapped.

    Yeah, it's socket 478 on an Intel D850MV motherboard. Regarding possible processor upgrades, I need a bit more processor power for editing video (and sound for radio broadcasting).

    I visited the Intel site and it says that the 2.6Ghz pcu is the fastest one supported by my current mb. But perhaps I've misread it.

    I'm currently sourcing a new cpu and I'll keep you informed about my progress.

    Thanks again.


  • JimK100 Nov 25, 2008

    Thanks again, Tekki. Regarding your questions - as I said, there is absolutely nothing at all firing up (other than the green led on the mb).

    • NO power supply fan,

    • NO keyboard lights,

    • NO smell from the cpu,

    • NO system beep codes - nothing.

    I've got 1.5Gb. of memory and the psu is 500w.- over the past couple of years I've already replaced the memory modules, system and sec.hard drives (almost 1Tb. in total), dvd drives, power supply, network card, and a few other more minor parts. So, as you can see, not much left but the cpu to do now!

    I don't want to spend time changing the power supply unit into another machine as I'm fairly sure the problem lies with the processor. And, as I was intending to upgrade the processor in the first place, I may as well do it and see what happens. If it doesn't work then I'll have to suspect the mb or the psu. I'll keep my fingers crossed that it's the cpu but I'll keep you informed. Thanks again for your time and expertise. Best wishes. Jim.

  • JimK100 Nov 29, 2008

    Me back again, Tekki. I've now installed the new 2.6Ghz. Intel Pentium 4 cpu and the good news is that everything seems to be firing up as expected. However, I'm not getting any boot-up screen at all. THe only response i'm getting is a double bleep code about 60 secs. after switching on. Then nothing more happens. Could you tell me is there any process that has to be undertaken to allow the new cpu to be recognised or any new BIOS procedure that I have to do? If so how is it done when I can't boot up. I still have my laptop to access the 'net if anything has to be downloaded. This is all new ground for me from this point on. I would appreciate any pointers you could give me. Best wishes. Jim.

  • JimK100 Dec 09, 2008

    Hi Tekki..

    Glad to say I've now got my PC sorted. After I replaced the new cpu everything fired up as you would expect but then nothing appeared on the screen. Turned out I had to get prof. help and the problem was easily sorted with the bios being flashed etc.

    So, thanks for all the time you spent helping me. I really appreciate it. All the best for the future.




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There is a very good chance of having zapped th cpu wit static if u didnt ground ur stat lec on a radiator or something metal.. or much more likely th motherboard if th points on that were touched..why was th cpu removed.?? and did u apply some anti thermal grease btween th cpu and th heatsink block when u replaced it.?? not that th lack of it wud affect th cpu straight away neccessarily.. but over a time th cpu would get hotter than it should/would with thermal grease applied.. is there no movement of anything at all now.?? because that cud b a connector attaching th power cable to th motherboard is unplugged..this wud either b th long connector that goes direct to th m/b or a little 4pin one.. alternatively it cud b th tiny connector attaching th heatsink fan to th m/b..but this is unlikely as ur cpu would undoubtedly have overheated and gone kaboom by now if that was th case.. plus th power supply wud still b sparkin juice still.. some pc's have a tiny on off switch at th back (not to b confused wit th tiny adapter on th power supply as that changes th voltage) if all this appears to b in order im afraid it looks as tho either th m/b, cpu, or power supply have blown.. did u touch ne of th pins on th processor.?? lol sorry bout th length o this msg haha once i start i cant ******* :oD Tekz.+*♥

Posted on Nov 23, 2008

  • 1 more comment 
  • Dyanne Reinis
    Dyanne Reinis Nov 24, 2008

    hey dood.!! ok..1st of all..when u turn on th tower does th power supply fan go round.?? or anything spark up that u can either see or hear apart from th 1 lil light on th mb...wen u turn on the tower usually ul hear a succession of beeps.. can u hear them this time.?? and if so can u count them for me..or is th heatsink fan buzzin.?? check to see if any lights come on the kybrd n mouse..if u can swap th powerlead for a kettle lead if uv got 1..plug other appliances in th sockets to make sure its not them at fault..aaaarrggghhh im gonna b late :o) haha sorry gota fly.. laterrz.!! il get back to ya soon yeah.??.. lol...Tekz.+*♥

  • Dyanne Reinis
    Dyanne Reinis Nov 24, 2008

    ok... now im commiting a cardinal sin in making assumptions about an inanimate object that could b sitting ina room halƒway across th world haha il never learn.! right.. assumin all th things iv asked u to do have come up with nada th only thing leƒt to me is to tell u exactly wot u need to buy.. lol at th moment itsa toss up tween th mb and cpu..goda b 1 or th other..u may b able to still smell th burnout which will tell u ƒo sho.!..i suspect its th cpu..sorry to say..iƒ it is dont b tempted to use th same heatsink..ur asking ƒo trouble.. sooo not worth it with th price of cpu's..jus buy th whole thing.. ƒan too.!! lol.. oh btw.. do u have sp3 updates yet.?? and do u no iƒ th updates r ƒinishin or do they cancel out halƒway thru..haha bane of my existance at th moment is th 3rd serv pak lololol :oD

    ok..we'll try to get into saƒe mode 1st but i wont hold mi breath lol i assume u no how to do that yeah.?? th pc starts up..IF it starts up.. listen out ƒo th beeps..u should hear 1 beep.. this is norm and shows all is as it shud b..any more than 5 beeps and its th mb and/or cpu..but th chances are that it cud have killd th cpu at th same time.. wot socket No. is it btw.?? is it 478-pin.?? oh and u cudda gone up to 2.8GHz not 2.6..still 800 MHz bus speed haha which is neither here nor there if it aint workin :oD haha bear with me its Monday and im trying to work jus not v much :oD its taken me over an hr to type this hehehe Mondays shud b banned due to lack of interest ay.!! RIGHT.!! na whr was i lololol.. haha i bet ur sooo glad i answered ya yest.!! NOT.! :oD thatl teach ya.! lolo.

    right try to get into saƒemode as i said..if by any strange quirk of ƒate it lets ya..wer in.!! then u go to My Computer > on th C:\ drive and go down to properties.. click on th tools tab and ask ƒor a checkdisk..checking th 2 option boxes..then wotcha do is reboot and let chkdsk do its ting..if uv got this aƒr ya laƒƒin.!! like i said..dont hold yer breath tho haha.! nxt time it boots go into saƒemode again (usually ƒ8..agree to system restore taking u back..( i always go back as ƒar as i poss can at 1st then wen ya sorted th prob restore to last week.. or to a time when ur sure ur system was in optimum condition)..

  • Dyanne Reinis
    Dyanne Reinis Nov 25, 2008

    tell me Jim.. do u have another comp.. or a friends or fams comp that u cud change th power supply with..or test ur ps on another machine.? cos im thinkin summings not right there.. but cos im not there with it i cant use my tekkies intuition lol.. its like not being able to read body lang.. u didnt say wthr th fan on th powr sup was workin.? or wthr th kybrd lights flash on.. i think mybe i bin missin summing..haha def missin mi brain at th min i reckon lol.. right il tell u y i think it cud b th ps.. theres a code i always use in analysin faults..i kinda go thru th motions of travellin thru this eternal and growing list in my mind.. i prob fix on average 15 putas a day (i work at a uni as an on call tekky for half th wk then study for th rest cos im also an apprentice network engineer for th uni) so i goda have some kinda code :oD and im also on a waffle again haha shurrup dyanne.!! lmao.! right il tell u th list i go thru to determine where th fault lies.. i start wi th ps asking

    are the LED lights on th sys case lit.?

    is th fan runnin on th ps.?

    do u see ne lights on ur kybrd.?

    if th ansa to ne of these Qs is yes then it aint th ps.. and im not sure a lil diddy light on th mb puts itself into this cat..but ud expect there to b at least 1 of th 3 if th ps wa workin..remember wen i go to a poorly puta and 1st turn it on i cant see th mb..with th lack of these 3 i wud def come to th conclusion that its fizzled.. then i wud take th tower cover off..(aft checkin all th cables etc..) then try n reboot cos now i can see th innards.. at this point i wud get as close to th heatsink and try n smell th acrid stench o death lol..if thats absent id go n buy a new power supply as well as th cpu.. 400 watt will do it.. dont b tempted to get a 300 watt cos ul b makin a rod for ur own back.. get th whole cpu/heatsink/fan u really dont wanna b puttin ur old heatsink back on cos its life has diminished..and it wud take th cpu with it.. haha made dat mistake..n ya only do it once lol.. oh and DEF get some thermal grease..jus b careful u dont overload it and it comes out th sides cos itl go on th pins of th cpu and ur friendship with it will b short much RAM hav ya got.?? u really need 512 minimum or it will still run slowly..right then..i think dats about it..if u have any probs u no where to find me :o) good luck hun.. ima keepin mi fingers crossed for ya haha.. laterz Jim x.x.x



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