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#11
Yes, I agree with @doctore, remember to be careful with the CMOS battery when putting it back, pay attention to the + and – signs. After putting the battery in, press the power button of the PC for 15 seconds to discharge any remaining power stored in the capacitors. By discharging the power, the CMOS memory will reset, therefor should reset the BIOS.
If that doesn't work, your other option would be to check the SSD on another system (PC) and see if it boots there.
If it doesn't work then too, the SSD is most probably dead, I'm sorry.
CK_WD