Head Unit Help Please!

[fngizmo7]

I have a Sony CDX-M8800 CD/MP3 Player Installed. Everything worked fine for about 6 months, until I discovered a short near the sub-woofers. It blew a few fuses on the amp. After replacing the fuses on the amp, the amp worked for about a few hours then the system shut off. So, I thought it was the amp and have since got a new one. The new amp, now has power, and everything is installed properly. The subs are still working fine (tried them out in my friends car). I also tested the rca's to make sure there wasn't a pinch or something in the wiring back to the amp and it was passing signals fine. The only thing I can think is that the Head Unit itself is not sending a signal to the pre-outs.

Has anyone ever heard of the pre-outs burning out? Can this be fixed?

I already reset the radio itself and that didn't work. The inside speakers work fine, its just not sending any signal to the amp. Also, I don't have another HU with pre-outs to see if another one would work. Any suggestions?

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