Is my I-PAC4 broken?

[Bursar]

Recently I've been getting on with my cab, and I went to set it up today to have a quick play, but my I-PAC seems dead.

The I-PAC was fixed inside the control panel, and it hasn't been fiddled with since I last used it several months ago.

Today I plug it all in, and nothing happens.

The keyboard works perfectly if it's plugged directly into the PC. When it's hooked up via the I-PAC, the num lock light comes on as Windows boots, and then half way through the Windows XP boot all 3 LEDs on the keyboard flash twice, and then they all go off.

When it boots into Windows neither the keyboard or sticks and buttons work.

I thought maybe one of the wires on the joysticks/buttons was shorting, so I removed them all from the I-PAC but it hasn't helped.

The jumpers on it are set to MAME and PS2.

I've had the I-PAC about 8 months or so.

Any advice on what I can do to get it going again would be greatly appreciated.