It certainly sounds like a hard brick if there's no life in it at all. Generally the only way to fix a hard brick is to either JTAG the chipset in order to reflash the bootloader, or completely replace the motherboard. JTAG'ing is not something a normal person can do because it requires knowledge of microelectronics and a very large/expensive machine to do the procedure.
There's an online company called MobileTechVideos that performs the service if you can't find one in your location. Since the Ace is mostly an international phone, it would require you to send the phone to the US though.
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