Got one of these myself, running an Athlon 64 X2 dual-core, 4 GB RAM, etc. An SR1619UK. I'm just trying to figure that one out, actually. It could be the hard drive.....but they sit pretty high in the old Presarios.....unless you've got dual DVDs, like me.
Dual optical drive cage.....media card reader below that (which never has worked); yup, your hard drive's missing. Not only that, the cage has disappeared, too. Some of your RAM slots seem to be missing, as well! Begs the question, this; what on earth were ya doing to the old girl?
What you can see plugged into the IDE interface down the lower left of the board is the ATX power connector; the 'primary' end of the IDE/PATA cable which is connected to your hard drive & optical drive/s should be plugged in next to it. Mmm..... They don't tend to work too well without something to boot from.....
Threw me out a bit, 'cos you've posted a 'mirror' image..... Not only that, but your board looks to be mounted upside down as well. Veeery odd. I don't think I ever seen a PC where the card bay slots are mounted halfway up the case before.....
Edited by Mike_Walsh, 11 October 2016 - 07:32 PM.
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Compaq Presario SR1916UK; Athlon64 X2 3800+, 3 GB RAM, WD 500GB Caviar 'Blue', 32GB Kingspec PATA SSD, 3 TB Seagate 'Expansion' external HDD, ATI Radeon Xpress 200 graphics, Dell 15.1" pNp monitor (1024 x 768), TP-Link PCI-e USB 3.0 card, Logitech c920 HD Pro webcam, self-powered 7-port USB 2.0 hub
Dell Inspiron 1100; 2.6 GHz 400FSB P4, 1.5 GB RAM, 64GB KingSpec IDE SSD, Intel 'Extreme' graphics, 1 TB Seagate 'Expansion' external HDD, M$ HD-3000 'Lifecam'.