I can't tell, Is this a DC-DC converter?
I bought a really cheap one from
www.mpja.com and it only has enough amps to power the motherboard OR the hard drive. So I bought some 12v Zener diodes and I'm goimg to connect the hard drive, CD-Rom, any peripherals straight to the battery making sure they are getting 12v not 14. This was my solution.
By the way, Have you tried just powering up certian parts of your player? Maybe just the Motherboard, or just a hard drive? Them you know it worjs, it just dosen't have enough juice to do everything you want it to do.
Trav