I have a problem with a Dell Inspiron 530s with Vista SP2 loaded (just reloaded).

When booting the computer, I get 2 short beep codes. According to Dell, this refers to not recognizing memory modules. There are 2 sticks of DDR2-5300 512B. I take one stick out and the computer works on just 512MB in slot one. I switch the sticks and the other works. I switch sticks and the original may or may not work. I put both in (slots 1 and 3 or slots 2 and 4) and get the beep codes.

I have taken memory from a known working computer and get the 2 beep codes. I inserted the stick in slots 1 and 3 and after that in slots 2 and 4, all with the same results.

The only way I can get it to boot is 512MB inserted into slot one.

Any ideas??

JMHCS