Unhappy Stuck on tricolor screen.

Hello,

Since yesterday my HTC stopped working, it gets stuck on the tricolor screen:
ONBL 1.11.0000
SPL 1.11.0001
F256

I tried to hard reset it, but it doesnt solve the problem. Activesync doesnt recognize the device either. Probably my rom or bootloader became corrupt ?

The device is completely original (English version), i didnt install any custom ROM or hack.

Is there a way to reinstall the device with a new rom from SD-Card or without needing ActiveSync ?
I have another working P3470 - maybe it can be used to extract the ROM from there and reinstall my corrupted HTC ?

The question is: How ??

I hope someone can help me out with this issue.

Thanks