I have a HP pavilion a1510n , with 1 gb ram, wanted to upgrade it to 2 ( 2-->4 *512), so I checked the hp website , they say "compatible ram 184 pin, ddr 3200 , sdram, 400mhz, no parity)
I checked the ebay and got the ram with the same description, got the ram by post, first , they look different, each of my ram sticks has 8 chips on just one side (totally 512 mb)
the new chips is both sided, each side has 9 big chips ! and two small one in the middle, but the same 184 pin (the new ram label says: pc3200 ddr sdram 64M*72 512 mb)
I installed just the new rams, dark screen , didnt boot up, long single beeps, repeat every few seconds, then tried all four rams, two old ones in the first two slots, two new ones in the other two slots, the same beep, !!!
any help is DEEPLY appreciated :)