AC6605 stuck in BootRom

I have a Huawei AC6605 in the office working nicely for several years, until a month ago when an energy blackout hit it.

Now the port LED's remains off (except for the internal LEDs),

When I connect to the serial COM port shows:

BIOS Loading ... Init BootBus ... done init DD3... Press Ctrl + A to show DDR details.. en: 1, clkf: 11, p11_MHz: 550, ddr_hertz: 550000000, error: -17000000, best_error: 533000000 Measured DDR clock 533314908 Initializing DDR interface 0, DDR Clock 533314908, DDR Reference clock 50000000, CPUID 0x000d900a row bits: 15, col bits: 10, banks: 8, ranks 2, dram width: 8 size: 4096 MB {MORE LINES OF INFO} ROM start. 

And the sequence starts again in a loop.

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Full dump:

https://ibb.co/d4sw30g https://ibb.co/5v9bKJJ (sorry for the poor quality) 

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I think it's a BIOS issue because don't enter in the BootLoad sequence, But I don't have experience with these deep errors.

https://download-hk.huawei.com/mdl/image/download?uuid=33811a5621b048289f602cf018770f5a 

Thank you in advance.