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V1.0 Board With No Audio


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#1 xboxmods2977

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Posted 24 May 2010 - 02:27 AM

As the topic title states I have just acquired an Xbox mobo (board only, no HD or DVD) version 1.0 and it has no sound, even during flubber.

I know my cables are good.
I know the AVIP port is good (continuity from red and white plugs to avip pins on bottom of board good).
I know my TV is good biggrin.gif

I did a little research online and found that apparently, the xbox 360 has lots of sound issues. biggrin.gif

I vaguely remember a post here about a sound issue and the O.P. had to replace a transistor but I think that issue was regarding a 1.6.

Also, I know the xbox supports DTS but if memory serves correctly, the analog audio signal could not be disabled via MS Dash, but even so having no HD connected, I don't see how such a setting would stick.

Any ideas? Thoughts? Opinions?
Semi-coma?
Common issues?

Thanks

If I can't revive the board, I can always use the ram I guess. smile.gif

#2 Alex548

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Posted 24 May 2010 - 02:50 AM

Are you using a genuine MS A/V cable?

Some HD A/V cables and 3rd party cables didn't always work.

#3 xboxmods2977

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Posted 24 May 2010 - 04:48 AM

Yep.

#4 xboxmods2977

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Posted 25 May 2010 - 09:09 AM

I fixed it guys, Thanx for the help.

For future reference, This is what I did.

Near pinhole 15 of the LPC on the bottom of the motherboard, there are 2 traces that run directly next to this hole. The trace closest to the pinhole had been severed in a botched modchip removal/installation attempt.
I soldered a wire from point "A" to point "B" and the sound works.

The weird part of the whole thing is that pins 1 through 6 still had the factory applied solder. Pins 7 through 16 were the holes that had been tampered with. Maybe a sloppy repair by MS? Or maybe a case of someone who knew absolutely nothing about nothing trying his/her luck at installing a chip? I dunno. It's fixed anyway.

Cheers!

EDIT: PIC
IPB Image
The trace closest to the pinhole was severed.

Edited by xboxmods2977, 25 May 2010 - 09:33 AM.





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