HI sMcBride424, and Welcome to SpywareHammer! ;D
I agree it would be most unusual for both cables to go bad. Do you get any beeps from the system when you start up?
Before we explore further you might try changing the CMOS battery on the motherboard. A failing battery can cause problems ranging from the system time and date resetting whenever the computer is switched on to failing to recognise hardware. I think that would be well worth doing considering the cost (a couple of dollars).
The battery will most likely be a CR 2032 and looks like this:-
It should be easily seen when the computer case is removed. Unplug the system from the power socket first, then press the power button to dissipate any residual charge. Try not to touch any components or circuit boards while you are changing the battery as these are easily damaged.
Also, make sure you don't get any finger grease on the top or bottom - a sock worn on the hand is a good idea (not the one you are currently wearing though). The old battery will be held in place by a spring clip - simply ease the clip up until the old battery can be removed and then pop the new one in.
The system should reboot OK, but you may occasionally see some unusual behaviour (time format wrong, trying to boot from the floppy drive and so on). If that is the case then as long as the system actually boots we can sort that out.
Usually you will hear some sort of warning beep when an error is encountered on start up. If so, let me know what they are (something like 1 long beep, 3 short beeps).