My PC was running fine till yesterday. But when i wke up today and tried to boot it,nothing happenend.as if there is no power at all.none of the fans moved nor any led came to life,nothing at all.then i OPENED up the cpu box.checked the connections,ram etc. But still nothing moved.it seemed to me that problem is with power suply.but then i noticed SOMETHING peculier.when i oressed the power button,my motherboard fan moved a bit..just a bit..not even one rotation..probably only 2 degrees.for further diagnoses,i tried a dew more things.second observable things happened when i removed both of my RAMs.when i pressed power button without ram,the cpu fan did two-three rotation..complete rotation this time.third noticable thing happened when i disconnected the power cable of hrd disk.all the fans and leds came to life..cpu sounded as it generally does..there was power in dvd writer.i thought i could boot linux from my cd..but sadly it didnt boot.screen showed-"A bootable devicd has not been detected.please refer to the product guide at http:/support.intel.com/support/motherboards/desktop"...and yes..when i reconnect the hard drive..the situation becomes as it was...like no power..sort of dead pc.
And yes..i wud like to inform..its i3 DH61HO classic series..i hav four gb ram..and not any graphic card installed other than the one which comes inbuilt.and hrd disk is of seagate.please help me.I suggest you replace the power supplyThere is a update. After trying a lot of things.i could boot linux from my cd drive.actually booting from optical discs was disabled.but i cd do it only when the power cable to my hard disk is not connected.as soon as i connect power cable to my hard disk.its dead...like no power..the motherboard fan makes two rotations perhaps..rest doesnt even make a slight movement.and as i said..as i remove my power supply to hard drive..pc springs to life.and i hv successfully booted linux.i posted it on yahoo answers as well.one man suggested that the power to my hard disk might not be enough.can it be so?or is the hard drive the culprit.
Ps-cables are fine..i have tried new ones as well.As i said...i3 ...its 2.99 ghz ..i hd 32 bit win 8...i wd hv tld u a lot mre abt modrboard..bt i neither hv d box NR d pc to check d specs..i wrte d name f series above..might be f sm help..i hv no ext graphics card...ddr3 4 gb ram..is dr nyyhing else u need to know...i wipl try my best to tell u Quote from: Geek-9pm on February 02, 2015, 11:34:17 PM

Ignore the above post if your PC is worth LESS than $300.
BTW: What are the specs for your PC?