Originally Posted by mliew
Thanks for the update Valence01. So do you know exactly why cutting the jumper cable seems to work? Were you cable to verify exactly what the pins it connects actually do? It'd be more reassuring to me to know what I might potentially break on my cable by cutting the jumper wire before I actually do it.
Well, in the case of my VGA cable, cutting the jumper between pins 18 and 20, tells the 360 that this is NOT a VGA cable. The fact that neither of the other 2 possibilites is jumpered, tells the 360 that it isn't a composite, HDTV, or SCART connection either. Various combinations of the 3 possible jumpers, are for those. It isn't clear to me, in the case of the component cables described by others here, exactly how the TV/HDTV switch is wired to the pins, since the component cable that I examined is wired differently.
The worst thing that would happen if you cut any jumper on any of the pins 18 thru 28, is that the cable won't function correctly for the original use of the cable. That is, if it was an HDTV/TV cable, it may not work for that anymore. Since most people in this thread, are just trying to use the cable as a substitute for the "audio only" dongle, that shouldn't matter much, but if you still want the original function of the cable too, you may need to provide some means to reconnect the jumper.
As for the various combinations of jumpers and what they mean to the 360, there is some difference of opinion among the sources out there. Here's what I think, based on some testing and reports from others:
18-20 22-24 26-28
-yes----yes----no------composite, no reboot
-no-----yes----yes-----SCART (euro TV)
-no-----no-----no------no audio, no reboot
The only one that I know works for sure to avoid the reset when switching TV input, is the one in the table labeled "Composite, no reboot". Well, the last one with no jumpers doesn't reboot either, but there's no optical audio in that case. That makes sense, as that's what you get with no cable attached at all (save for the HDMI).
So, if you have a component/composite cable, then removing the jumper between 26 and 28 is absolutely correct. I went back and double checked the component cable and there IS a jumper between 26 and 28, just like everyone else reported here. If you have a VGA cable, in addition to the jumper already present between pins 18 and 20, you need to put a jumper between 22 and 24. Could put a switch there, if you wanted to still be able to use it as a VGA cable sometimes.