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PC did not power up. Replaced the ps with BFG 800w. Now the system attempts to power up but the fans only pulse and pc still does not boot. Motherboard gone bad??
Check the cmos reset jumper and check the case switch then.. I would look on the jumper positions for the case and short the PWR SW to see if the case switch is messed up. Then make sure to check all the peripherals.. remove them and re-install... make sure the memory is set in properly. Try to boot without any drives plugged in to see if any drives might be bad.
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Disconnect everything from the motherboard except the power supply connections and cpu fan. Install one stick of RAM and connect your monitor. Then try starting up. See if you get any BIOS boot messages. This will tell you that the board and processor are okay.
With what you say you've tried already, I'm thinking you might have a bad processor. Most every other problem would result in some kind of error like POST beep codes or messages on screen. If the system still doesn't boot with the bare minimum parts installed, replace the processor.
hi have you heard any beeps when pc starts they tell you whats going on 1 beep all good and so on what ive found over the years is some times things need to be reseated turn pc off unplug try to start to drain power touch psu with hand on metal to earth then take ram out and reseat it same as batt take out try to start with no pwer to drain board again but in go in to bios change any setting like which hard drive you want to start first tell me how that goes cheers mate ps i never heard of cpu being limited by ram its you motherboard and os system which deside how much ram you pc can handle 32bit can read 4 gigs 64 bit over 12gigs
Most of the time you'll never hear the CPU fan. If you don't hear the normal fan sounds coming from your computer, it is most likely the power supply cooling fan. Hold you hand at the back of the computer where the power chord plugs in, while the computer is running, and test if you feel air blowing on your hand. If you don't, then replace your power supply. Make sure, when checking for a new PS that you get the correct pin count. Best to order from Dell since proprietary systems usually use proprietary parts and a generic PS won't fit in the opening at the back of the computer (alignment of the plug and the fan with the opening, etc.)
I would check the bios and see what the shutdown temps are for the cpu as they may be set too low ( check the manuals for the cpu's as you dont want to set it too high as obviously if it does get too hot you dont want the cpu's ( processors ) to blow up or die on you.
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