You're probably misreading the silkscreen markings on the board. F_LINE_IN should refer to the connector for the front panel audio input jack.
The only common port I can imagine for connecting a SIMM card reader (are you sure you don't mean flash memory card reader) would be a USB header.
I hope this works right. Thanks for the reply, but it really said "F_LINE_IN", and yes it looks to be a stero input to the pegatron MOB, but that is where it was plugged in. The connector is 4 pin female in line with a fifth plugged for orientation. According to HP this is a 15 in one reader(?) but it has four slots for various size boards, and I really liked using it. The other multi card readers I have been looking at all seem to use the USB bus. I fear I will never get this one running again. Looking for any kind of suggestions or leads. The HP part number for the reader is 504857-100 if that will help any one familiar with their gear.