OK So I just bought this Dell Inspiron 600m from Goodwill and I discovered I had to replace the motherboard because it wouldn't recognize the battery. So I did and I put everything back together. The new motherboard has been working great but there is one problem that has been bugging me for the longest time. Sometimes when you go to turn it on you click the on button and the 3 lights (caps lock, scroll lock, etc.) flash rapidly in succession (It might be a POST code but it doesn't seem to be because they flash much quicker then any POST code I've seen on that computer and they don't light up all the way, they sort of flicker like their having a seizure.) It does that for like 10 seconds and then shuts off. To fix it I usually have to shake the computer or tilt it on it's side, pretty much fiddle with it until when I turn it on it boots normally. While it's doing that weird flickering thing I can usually shake it and have it start immediately so it seems like it might be a loose connection or something but I'm not sure. This happened with the first motherboard I ordered so I got a refund and I was sent a new one. Since it happened again with the new one I assumed it wasn't a fauly motherboard since the chances of getting 2 faulty motherboards in a row with the exact same problem are very slim. I am using the other parts from the original computer and the original motherboard never had this problem so I'm stumped. I've completely disassembled it several times and this happens every time I put it back together. Is it a cable or something that isn't in properly??? Any help would be GREATLY appreciated.