text: abit be7 mobo? i just installed a new antec 350w p.s. after the 1st one suddenly started smoking and sparks were shooting out. after installing the ps i get power to the mobo since i see there is a light that is lit onto it but beyond that it does not fire up. is the mobo the device that is bad and not the ps? how do i check? i unfortunately do not have any spare parts to try and swap out to determine. are you getting the post (power on self test) if not then i would suspect that you mobo has been damaged by your bad power supply. if you do get the post, the following codes are for your mobo  mobo error = 1 long, 1 short, or no beep power supply = continuous , 999's or no beep  unluckily for you without the parts to swap out it will be difficult to pin down the cause, good luck