I'm surprised that you have such an old device, not often you see those :)
I've got steps for you, but there is a slight chance that you will have to send your device to RMA procedure.
- Update your bootloader to this 3.0.1 version. Make sure you're updating the bootloader, not firmware.
- After that, update your firmware through the same bootloader menu.
- Wait for the update to be done.
After that, you should have functional RUT955, if not - I'm afraid you will need to proceed with RMA.