View Full Version : moved MB from atx case to at case, now not working

September 23rd, 2012, 10:18 PM
ok, the answer to this may be real simple but i'm just not seeing it. i have a motherboard with a pentium 233 installed. its an AT style MB with both an AT and ATX power connector. i had this MB housed in a ATX case because thats all i had avaliable. it was hooked up to an atx PSU and worked fine except that the backplate wasnt there because i do not have or seen a AT backplate for an ATX case. so the giant rectangle hole in the back was just kinda annoying me so i came across a super cheap brand new AT case at goodwill and decided to swap cases if only for athetics. well now the board doesnt work. it powers up but will not display to the monitor and it continously beeps. I have it hooked up exactly the same with the only diffrence being i'm useing an AT PSU and the AT PSU connector on the MB. i've tried resetting the ram and all the basic stuff with same results. any ideas?

September 23rd, 2012, 10:26 PM
The first thing that pops into my mind is to check the output voltages from the AT PSU. The second thing is perhaps something is being shorted by the board supports in the AT case. Try unscrewing the motherboard and temporarily slipping a sheet of cardboard under it. See if that takes care of the beeping problem. It could also be that any cards you have inserted aren't seating correctly in the new case.

September 23rd, 2012, 11:03 PM
that was it, an extra contact under the board that was causeing the issue, works fine now. figured it may be simple. thank you