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Message: <blockquote data-quote="eyepea" data-source="post: 13398437" data-attributes="member: 200324">Computer not booting.Tried various things. Still no luck.  ithin okkoma galawwa. <img src="/styles/default/xenforo/smilies/default/P.gif"  class="smilie" loading="lazy" alt=":P" title=":P    :P" data-shortname=":P" />Now only mother board with cpu and cpu fan.board is intel DG31PRBoard out of case to eliminate shorting to case issues.Vacuumed to avoid any dust issues or any mobo shorts. (Of course can't be 100% sure)Can't see any damage on mobo. Anyway me no x-pert <img src="/styles/default/xenforo/smilies/default/no.gif"  class="smilie" loading="lazy" alt=":no:" title="No    :no:" data-shortname=":no:" />cpu removed and re-seated.Connected only psu main connector and 12v connector.(psu is a known good working one).(1)Switched on psu.mobo light on.(2)shorted power switch contacts.cpu fan starts.no beeps! <img src="/styles/default/xenforo/smilies/default/no.gif"  class="smilie" loading="lazy" alt=":no:" title="No    :no:" data-shortname=":no:" />since no ram, if mobo booted, there should be ram error beep - am I right ?here am assuming on-board beeper working. Anyway to test that ?(3)shorted power switch contacts for 10 sec. cpu fan stops.-----Does this behavior pattern indicate what the problem is ?since still prob, reset the cmos - removed cmos battery, left for 24 hours. also shorted battery contacts as advised in a previous thread. put back battery.retried steps (1),(2) & (3). No beeps.Borrowed known good working post card.Fixed on pci slot 1(1)Switched on psu.mobo light on.post card 3.3v led on. (same behavior on a working similar mobo)(2)shorted power switch contacts.cpu fan starts.post card 5V, 12v leds in addition to 3.3v one on (same behavior on a working similar mobo)BUT post card does not start counting!no beeps either.(3)shorted power switch contacts for 10 sec. cpu fan stops.post card back to 3.3v led only.----since pci slot may have contact prob, tried post card on pci slot 2, and repeated steps (1), (2) and (3). No luck.(Well have heard that post card should be in pci slot 1 usually. But have seen post card ok in either pci slot in working mobo <img src="/styles/default/xenforo/smilies/default/oo.gif"  class="smilie" loading="lazy" alt=":oo:" title="Oo    :oo:" data-shortname=":oo:" />)----I don't have another compatible cpu or mobo at the moment to swap and test.(well swapping cpu is not my favorite thingy, and don't wanna mess other peoples working computers either <img src="/styles/default/xenforo/smilies/default/wink.gif"  class="smilie" loading="lazy" alt=";)" title="Wink    ;)" data-shortname=";)" /> )Anything else I could try ?How can I know if mobo bad or cpu bad ?since post codes not shown, either post is not started, or did not come up to a stage where post codes are outputted.When mobo powered on, gpu chip and io controller chip etc get warm.under area of cpu gets warm.But I could not detect cpu heatsink warm as fan is running and I did not keep board powered on for long time.Can the cpu fry, if powered on without cpu heatsink ?If cpu will detect cpu fan on, I can have the fan just connected.In such a situation should the cpu shutdown immediately and be protected ? Should get high temp alarm beep ? Just wondering to check if cpu gets warm <img src="/styles/default/xenforo/smilies/default/oo.gif"  class="smilie" loading="lazy" alt=":oo:" title="Oo    :oo:" data-shortname=":oo:" />cpu cold mean cpu dead or it can mean good cpu but mobo fault ?cpu warm mean working cpu or even bad cpu can get warm ?Any idea please ?Did not try this as I don't want to damage the cpu in case it is working <img src="/styles/default/xenforo/smilies/default/rolleyes.gif"  class="smilie" loading="lazy" alt=":rolleyes:" title="Rolleyes    :rolleyes:" data-shortname=":rolleyes:" />Remember reading somewhere that intel cpus are difficult to kill under normal conditions and protection circuits would shut it down. True or falls I don't wanna find out the hard way <img src="/styles/default/xenforo/smilies/default/P.gif"  class="smilie" loading="lazy" alt=":P" title=":P    :P" data-shortname=":P" />Well getting back to my question,in the problem am having, how to find out if cpu bad or mobo bad ?Any help, ithaaamathma isthoothi <img src="/styles/default/xenforo/smilies/default/yes.gif"  class="smilie" loading="lazy" alt=":yes:" title="Yes    :yes:" data-shortname=":yes:" /></blockquote>

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