Belongs in the Liteon section... where much help will be found
Not sure if they are alredy "flashfixed" to enable reverse flashing - if not, the a binary and LTNFW should do it.
What did you go from/to?
It shouldn't happen, but some medias do take a serious tumble in quality from one firmware to another - or the update just didn't "take" properly.
So it's a case of going back, or going the crossflash route to 1653S - if the drive is still in warranty, and has a problem from an official firmware update, it may be better to persue that route before fiddling.